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Basic Information and Definitions

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Basic Information and DefinitionsContents

Basic Information and DefinitionsInductive Sensors 954Photoelectric Sensors 968Capacitive Sensors 983Magnetic Cylinder Sensors 990Cables 995Materials 1000IEC Standards 1002Quality/Standards 1003Conversion Tables 1006


Basic Information and DefinitionsInductive sensors

Principle

Function groups

Sensing face

Standard target

Correction factor

Switching frequency f

... of inductive proximity sensors is based on the interaction between metallic conductors and an electromagnetic alternating field. Eddy currents are induced in the metallic damping material, which removes energy from the field and reduces the height of the oscillation amplitude. This change is processed in the induc-tive sensor, which changes its output state accordingly.

... of the Balluff proximity switch are:

... gives the reduction in sensing dis-tances for target materials which are not made of Fe 360. Unless otherwise noted.

... is a square plate of Fe 360 (ISO 630), used to define sensing distances per EN 60947-5-2. The thickness is d = 1 mm; and the side length a corresponds to – the diameter of the circle of the “sensing face” or– 3 x sn, if the value is greater than the given diameter.

... is the area through which the high-frequency sensor field enters the air space. It is determined primarily by the base of the shell core and corresponds roughly to the surface area of the shell core cap.

.. refers to the maximum number of switching operations per second. Damping is per EN 60947-5-2 with standard targets on a rotating, non-conducting disk. The surface area ratio of iron to non-conductor must be 1 : 2.

The rated value of the switching frequency is reached when– either the turn-on signal t1 = 50

µs or the– turn-off signal t2 = 50 µs .

Sen

sor

field

Sensing face

Sta

ndar

d ta

rget

Materialsteelcopperbrassaluminumstainless steelnickel cast iron

Factor1.0

0.25...0.450.35...0.500.30...0.450.60...1.00 0.65...0.75 0.93...1.05

Standard target

Proximity

switch

Sensor field,

Coil, Core

TriggerDemodulatorOscillator Outputdriver



Basic informationInductive sensorsPhotoelectric sensorsCapacitive sensorsMagnetic cylinder sensorsCablesMaterialsIEC StandardsQuality/ StandardsConversion Tables

Start-up delay tv

Temperature drift

Ambient temperature range Ta

Principle

... is the time from when the supply voltage is applied, and the proximity switch assumes the ready state. This time may not be longer than 300 ms. During this time there must be no fault signal longer than 2 ms.

Delay Times

Temperature Effects and Limits

... is the deviation of the effective operating distance with the temperature range of –25 °C ≤ Ta ≤ +70 °C. Per EN 60947-5-2 it is: ∆sr/sr ≤ 10 %

... is the temperature range over which the function of the switch is guaranteed.

Error-free function depends on the magnitude of the welding current and the distance of the sensor from the current carrying line.

Design and circuitry techniques ensure that magnetic field im-mune proximity switches remain unaffected by magnetic fields.

Currentconductor

Sensor

Magnetic field

Magnetic Field Immunity



Supply voltage UB

Ratedoperating voltage Ue

Voltage drop Ud

Rated insulation voltage Ui

Rated supply frequency

Ripple σ (%)

Ratedoperating current Ie

Off-state current Ir

Max. inrush Ik

Short circuit current

No-load supply current I0

... is the permissible voltage range in which certain safe operation of the switch is guaranteed (including ripple σ).It is indicated in the catalog section for each product.

... of a proximity switch is the voltage to which the isolation tests and the creep distances are referenced. For proximity switches the highest rated operating volt-age must be considered as the rated isolation voltage.

... is the supply voltage UB used for testing without tolerances. To determine the rated and limit values, the sensor must be operated using Ue. It is:

– for DC switches Ue = 24 VDC– for AC and AC/DC switches Ue = 110 VAC

... is the voltage measured across the load of a closed (conducting) sensor at load current Ie.

... of the power supply for AC devices is 50 to 60 Hz.

... is the AC voltage (peak-to-peak of Ue) overlaid on the DC voltage Ue given in percent. To operate DC switches, a filtered DC voltage hav-ing a ripple of max. 15 % (per DIN 41755) is required.

... is the permissible constant output current that may flow through the load Rl.

... is the residual current flowing through the load when a proximity switch is not conducting (open).

... is 100 A, i. e., per EN 60947-5-2 the power supply during testing in short circuit mode must be able to provide at least 100 A for a short duration. This cur-rent is prescribed in the standard in order to test the short-circuit strength.

... in the case of alternating current indicates the current Ik (Aeff) which is permitted to flow during a given turn-on time tk (ms) and at a given frequency (Hz).

... is the current, which flows in the switch, without the need for a load to be connected (only with 3- and 4-wire-switches).This current supplies the sensor electronics.

– for AC and AC/DC switches Ue = 110 VAC

Ue = rated operational voltageUss = oscillation width

Ripple σ = × 100 [%]Uss

Ue



... is the smallest load current required for function of the switch when ON.

... is the permissible total capacitance on the output of the switch, including line capacitance.

... is the resistance between the output and the supply voltage which is built into the switch; see “Output circuits”.

Minimumoperating current Im

Output resistance Ra

Load capacitance

Driver stages

3-wire DC switches

2-wire DC switches

2-wire AC and AC/DC switches(universal current switches)

S = semiconductor switchDz = Z-Diode, limiter C = capacitorGI = bridge rectifierLED = light emitting diode

S = semiconductor switchDz = Z-Diode, limiter C = filter capacitorRC = HF-Peak-limiterGl = bridge rectifierLED = light emitting diodeVDR = voltage spike limiter

S = semiconductor switchRa = output resistanceDz = Z-Diode, limiter D1 = pol. rev. protect. diode D2 = pol. rev. protect. diode in load current circuit (for short protection types only)LED = light emitting diode

PNP, sourcing(current source)

NPN, sinking(current sink)

Non-polarized

Output Circuits

ground connection for con-nector version only




DC 3/4-Wire

Normally open

Normally closed

NO/NC

DC 2-Wire

Normally open

Normally closed

AC-Sensors

Normally open

Normally closed

AC/DC-Sensors

Normally open

Normally closed

Wire colorsCoding per DIN IEC 60757

Polarized

Connector Cable/Terminals

NPN (–) sinking

Connector

with protection ground

Non-polarized

with protection ground

2

3

2

3

2

3

2

3

3

2

3

2

3

2

2

* *

* *

Wiring DiagramsCable/Terminals

PNP (+) sourcing

1

1

3

1

1

!

@

#

$

%

^

&

*

(

)

1

2

3

4

5

6

7

8

BN brownBK blackBU blueWH white

*Pin assignments shown are based on the U.S. standard for cable connectors



Utilization categoriesper EN 60947-5-2/IEC 60947-5-2

Typical load applicationsResistive and semiconductor loads, optocouplersSmall electromagnetic load Ia ≤ 0.2 A; e. g. contactor relayResistive and semiconductor loads, optocouplersElectromagnets

CategoryAC 12 AC-switchAC 140 AC-switchDC 12 DC-switchDC 13 DC-switch

Series connection ... can cause a time delay (e. g. start-up delay). The number of connected proximity switches is limited by the total voltage drop (sum of all Ud).

In the case of 2-wire sensors it is limited by the addition of the minimum supply voltages. For 3-wire switches, the load capacity of the output stage represents a further limitation, since the current consumption I0 of all switches is added to the rated current Ie.

The ready delay time tv is the ready delay of a sensor × (number of sensors n–1).

... of proximity switches with LED it is recommended that the out-puts of the individual switches be decoupled using diodes (as shown). This prevents all LED’s from lighting-up when the output state of one switch is turned on.

For parallel connection

3-wire DC switch 2-wire DC switch(AC/DC)

3-wire DC switch 2-wire DC switch

Parallel wiring of 2-wire proximity switches is not recommended, since missed pulses can be caused by the build-up of oscillations.




Polarity reversal protected

Cable break protection

Short circuit protected(sensors with a maximum voltage of 60 V DC)

Short circuit/overload protected(universal AC/DC sensors)

... protected against any possible lead reversal for sensors with short circuit protec-tion....protected against reversal of plus/minus leads for sensors without short circuit protection.

... in 3-wire sensors prevents improper function. A diode prevents the current from flowing via the output line A.

... AC or AC/DC sensors are often operated with a relay or contactor as the load.AC switching devices (contactors/relays) create a significantly higher load (6...10 × rated current) when they are first energized as compared with their static operation due to the fact that the core is still open.The static value of the load (current) is not reached until several milliseconds later. Not until the magnetic field is closed does the max. permissible rated operating current Ie flow through the sensor.This means that the threshold value for a short circuit condition in these sensors must lie significantly higher and would, if for example the contactor is prevented for mechanical or electri-cal reasons from fully closing, result in an overload on the sensors.

This is where the overload protection comes into play. It is designed as slow-acting (time-delayed). Its trigger threshold lies only slightly above the maximum permissible Ie. A response (i. e. turn-off) is delayed, depending on the magnitude of the overload, by more than 20 milliseconds. This ensures that properly working relays and contac-tors can be switched normally, while defective devices will not destroy the Balluff sensor. The short circuit/overload protection is generally of a bi-stable design, which means that it must be reset by turning off the supply voltage to the sensor.

... is achieved in Balluff sensors using pulsing or thermal short circuit protection circuits. The output stage is thereby protected against overload and short circuit. The trigger current for the short circuit protection is higher than the rated operating current Ie. Currents from switching and load capacitances are specified in the sensor data and do not result in triggering, but rather are masked by a short delay in the output circuit.


Basic Information and DefinitionsInductive sensors response curves

Axial and radial dampingWhen damping in an axial direction the standard target is moved concentric to the system axis. The switchpoint is there-by determined only by the distance “s” from the sensing face of the sensor. When damping in the radial direction, the location of the switchpoint is additionally affected by the radial distance “r” of the target from the system axis. The diagram shows the response curves, which indicate the dependency of the switchpoint on “s” and “r”.The primary purpose of this drawing is to show the possibility of damping using a lateral approach and the difference compared with axial approach Application Due in part to manufacturing tolerances within a production run, the exact switchpoint must in any case be established on site.The solid lines represent the respective switchpoint (E), the dashed lines indicate the turn-off point (A). The red lines ap-ply to switches with a clear zone, and the black lines for flush mount types. Since the switching operation can be induced from either direction, the curves are shown mirrored from the system axis.

ExamplesPassing objects on conveyor lines generate a signal change when their front edge crosses the turn-on curve on the entry side. The signal reverses again when the back edge of the passing object crosses the (mirrored) turn-off curve on the op-posite side. With reversing parts (e. g. limit of travel), the signal reversal occurs at the turn-off curve on the same side.

The vertical axis in the diagram shows the distance of the switchpoint from the sensing face. It is referenced to the nominal sensing distance sn. At a distance of 0.8 mm, a laterally approaching target reaches the solid line turn-on curve at point “E” and leaves the turn-off curve at point “A”.

The horizontal axis in the diagram is referenced to the radius of the sensingface. The zero point of this axis lies in the center of the shell core cap. In our example for the M12 switch, the radius is r = 6 mm. Example: The distance of the turn-on and turn-off point (from the system axis) is typically E ~ 2.75 mm, A ~ 2.95 mm.

Typical approach curvesusing the example of an M12 sensor with sn 2 mm

Standard target, axial approach

Standard target, radial approach Standard target, radial approach

Sensor diameter (sensing face)

Sensor




Housing Switching distance

∅ 3 mm* 1 mm flush∅ 4 mm/M5* 1.5 mm flush∅ 6.5 mm...M30 1.5...2x∅ 3 mm* 3 mm non-flush∅ 4 mm/M5* 5 mm non-flush ∅ 6.5 mm...M12 2.2...3x M18...M30 depending on version

standard switching distance per IEC 60947-5-2“2x” the switching distance vs. standard

“3x” the switching distance vs. standard

“4x” the switching distance vs. standard

Switching distance s

Rated operating distance sn

Effective operating dis-tance sr

Useful operating distance su

Assured operating distance sa

Switching distance identifier

Repeat accuracy R

Hysteresis H(switching hysteresis when target is backed off)

... is the distance between the standard target and the sensing face of the proximity switch at which a signal change is gener-ated per EN 60947-5-2.For “normally open” this means from OFF to ON and for normally closed from ON to OFF.

... is the switching distance of a single proximity switch under specified temperature and voltage conditions (0.81 sn ≤ su ≤ 1.21 sn).

... is any switching distance for which an operation of the prox-imity switch within the permissible operating conditions (tem-peratures, voltages) is guaranteed (0 ≤ sa ≤ 0.81 sn).

... is given as a percentage of the effective operating dis-tance sr. It is measured at an ambient temperature of +23 °C ±5 and at the rated operational voltage. It must be less than 20% of the effective operating distance (sr). H ≤ 0.2 sr

... is the switching distance of a single proximity switch mea-sured under specified conditions, e.g. flush mountable, rated operating voltage Ue, temperature Ta = +23 °C ±5 °C (0.9 sn ≤ sr ≤ 1.1 sn).

... is a theoretical value, which does not take into account manu-facturing tolerances, operating temperatures, supply voltages, etc.

... of sr is determined at rated operating voltage Ue under the following conditions: Tempera-ture: T = +23 °C ±5 °CRelative humidity: ≤ 90 % Measuring duration: t = 8 h.The permissible deviation per EN 60947-5-2 is R ≤ 0.1 sr.

Sensi

ng face

sn

sr

su

sa

81 % 0 %100 %

121 %

110 % 90 %

Sta

ndar

d ta

rget

none Switching distance 2X

Switching distance 3X


*Switching distance in mm. The switching distances for these sensors are not standardized.

Reference axis

Standard target

Assured switchingdistance

Sensing face

Proximityswitch

Switching Distances



Flush mountable proximity switches

Non-flush mountable proximity switches

Opposing installation of 2 sensors

Installation medium

... can be installed with their sensing faces flush to the metal. The distance from opposing metal surfaces must be ≥ 3sn and the distance between two proximity switches (side-by-side) ≥ 2d.

... can be identified by their “caps”, since they have no metal housing sur-rounding the area of the sensing face. The sensing face must extend ≥ 2sn from the metallic installation medium. The distance from opposing metal surfaces must be ≥ 3sn and the dis-tance between two adjacent proximity switches ≥ 3d.

... requires for all inductive proximity switches a minimum distance of ≥ 3d between the sensing face.

Ferromagnetic materials:

Alloys:

Other materials:

Iron, steel or other mag-netizable materials.

Brass, aluminum or other non-magnetizable materials.

Plastics, electrically non-conducting materials.

Installation in Metal Sensors with standard switching distance

Sensing face

Clear zone

Sensing face




Flush mountable proximity switches



... can be installed with their sensing faces flush to the metal. Installation in alloy may result in a reduction of the switch-ing distance. The distance to opposing switches must be ≥ 3sn, and the distance between adja-cent switches (side-by-side) must be ≥ 2d.In order to install the sensor in ferromagnetic materials, the following guidelines are used for dimension “×”.

Installation in Metal Sensors with switching distance indicator 2X

For Factor 1 sensors the dimen-sion × is not needed for installa-tion in metal.

... can be identified by their “caps”, since they have no metal housing surrounding the area of the sensing face. The sensing face must extend ≥ 2sn from the metallic installation medium. The distance from opposing metal surfaces must be ≥ 3sn and the distance between sen-sors ≥ 3d.

... requires for all inductive proximity switches a minimum distance of ≥ 4d between the sensing face.

Sensing face

Sensing face

Housing size dM8M12M18M30

Dimension × 0 mm 0 mm 0.7 mm 3.5 mm

Housing size d∅ 3 mm∅ 4 mm M5∅ 6.5 mmM8M12M18M30

Dimension × 1 mm 1.5 mm 1.5 mm 0 mm 0 mm 1.5 mm 2.5 mm 3.5 mm

Sensing face

Clear zone

3-wire DC

2-wire DC



Quasi-flush mountable proximity switches



... can be identified by their “caps”, since they have no metal housing surrounding the area of the sensing face. The distance from opposing metal surfaces must be ≥ 3sn. Installation conditions:

... require a space behind the sensing face which is free of conducting materials. Under this condition the specified switching distance is available without limitation. Dimension “×” (see fig.) indicates the shortest distance between the sensing face and the conductive material behind it.

... requires for all inductive proximity switches a minimum distance of ≥ 5d between the sensing faces. For exceptions see table.

Housing size d

∅ 6.5 mm,M8M12M18M308×8 mm

Switching distance 4X Dimension “×” for installation inferromagnetic other materials metals 3.0 mm 2.0 mm 4.0 mm 3.0 mm

Switching distance 3X Dimension “×”for installation inferromagnetic other materials metals 2.0 mm 1.0 mm 2.5 mm 2.0 mm 4.0 mm 2.5 mm 8.0 mm 4.0 mm

Sensing surface

Housing size d∅ 3 mm∅ 4 mm M5∅ 6.5 mmM8M12M18M30

Dimension b≥ 10 mm ≥ 15 mm≥ 15 mm≥ 8 mm≥ 8 mm≥ 10 mm≥ 20 mm≥ 35 mm in steel≥ 25 mm in alloy≥ 20 mm in stainlesssteel

Dimension c≥ 30 mm ≥ 40 mm≥ 40 mm≥ 32 mm≥ 32 mm≥ 48 mm≥ 72 mm≥ 120 mm

Dimension e≥ 10 mm ≥ 20 mm≥ 20 mm≥ 8 mm≥ 8 mm≥ 12 mm≥ 18 mm≥ 30 mm

Clear zone

Sensing face

Dimension a20 mm 45 mm45 mm

Housing size∅ 3 mm∅ 4 mm M5

Installation in Metal Sensors with switching distance indicator 3X and 4X

Clear zone




Installation in Metal SteelFace® Sensors

To assure proper function, the values in the tabel below and the figure to the right should be observed. (Fig. 1)



A≥ 2d

≥ 4d

Sensor2X Flush Mount

M8M12M183X Quasi Flush Mount

M12M18M303X Non-Flush Mount

M12M18M30

x Steel

0mm0mm0mm

7mm14mm28mm

25mm45mm70mm

x Aluminum

6mm8mm

11mm

12mm12mm28mm

15mm25mm40mm

x Brass

6mm8mm11mm

12mm14mm28mm

17mm25mm40mm

xStainless

Steel5mm7mm10mm

10mm16mm35mm

25mm45mm70mm

Opposing Installation of Two SensorsThis configuration requires a minimum separation of ≥3 Sn between the active surfaces for M8 thru M30, 2x and 3x sensors. (Fig. 3)

When installing in metals, the values for dimension x shown in the following table must be observed. When these guidelines are followed, the effective switching distance Sr will deviate less than ±10%. Values are in mm. (Fig. 2)

2X Flush Mount

M12M18M303X Quasi Flush Mount

M12M18M30Ferrous OnlyM8M12M18M30Non-Ferrous OnlyM8M12M18M30

Steel

1.0mm1.0mm1.0mm

1.0mm1.0mm1.0mm

1.0mm1.0mm1.0mm1.0mm

----

Aluminum

0.8...1mm0.8...1mm0.7...1mm

1.0mm0.7mm0.7mm

----

-1.0mm1.0mm1.0mm

Brass

0.7...0.85mm0.7...0.85mm0.7...0.9mm

0.8mm0.7mm0.7mm

----

-1.1mm1.1mm1.1mm

Copper

0.85...1.3mm0.85...1.3mm0.9...1.2mm

1.0mm0.7mm1.0mm

----

-0.9mm0.9mm0.9mm

StainlessSteel

0.5...0.9mm0.5...0.8mm0.5...1mm

1.0mm1.0mm1.0mm

0.45mm0.25mm0.5mm0.7mm

----

Reduction factors for target material Fig. 3

Sensing face

Fig. 2

Sensing face

A

Fig. 1



Mounting Guidelines for 40x40x62 Sensor with Bracket Variations

Original = PlasticOptional BES Q40-HW-2 = Metal

Sensing distance SnBracket

15 mmPlastic Metal

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

20 mmPlastic Metal

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Yes Yes

35 mmPlastic Metal

No No

No No

No No

Yes Yes

No No

No No

No No

Yes No

40 mmPlastic Metal

No No

No No

No No

Yes Yes

No No

No No

No No

Yes No



Basic Information and DefinitionsPhotoelectric sensors

Adjustable Sensitivity The ability of the sensor to discriminate between different levels of light incidence on the receiver. Used primarily to black out background objects, discriminate between materials, or transparent objects.

Alarm output The alarm output at the receiver (PNP open collector – 30 mA) triggers a warning signal in the case of functional interruptions, which can be caused by contamination or mechanical de-adjustment. The alarm output is activated if the received signal lies in the alarm range for a defined amount of time.

For series BOS 18M Teach-in, the entire product family, including diffuse and retroreflective sensors, is equipped with an alarm output.

Alignment Relation of the emitter and receiver. Proper alignment is necessary to achieve maximum sensitivity to objects being sensed.

Ambient Light Light that is present in a given area; e.g., inside, outside, incandescent, or fluorescent. In some cases, ambient light may affect photoelectric controls.

Ambient Light Rejection There are basically 3 different ways for the receiver to differentiate the emitter’s signal from the ambient light. As a practical consideration in setting up a system, it is advised to direct the receiver away from strong external light sources, such as the sun or industrial lighting. 1. Modulation - Pulsed light is different from continuous ambient light. 2. Filters - Filters block most of the visible light spectrum so that a modulated signal is more easily detected. 3. Focal Arrangement - Lenses are used at the emitter and receiver to focus the beam for optimum signal transmission. This lens arrangement actually makes the image of the emitter focus on the receiver just like a camera would focus an image on a sheet of film.

Ambient temperature The ambient temperature is the temperature range in which the function of the photoelectric switch is guaranteed. Balluff Standard: –15 °C ≤ Ta ≤ +55 °C

Amplifier A device that enables an input signal to control an output signal of that device.

Analog Sensors The output current or voltage is proportional to the target distance or surface.

Autocollimation Emitter and receiver use a common lens. The emitter light passes through the beam splitter and the lens to the reflector. The reflector bounces the emitter light back to the lens. This gives retroreflective sensors that work with autocollimation a small, round beam profile. Additional benefits: no dead zone for scanning and for the reflector, better small parts detection, and the switching characteristic is independent of the approach direction.

Axial Approach When a target to be detected approaches the sensing face “head on.”

Background suppression (BGS) Through the background suppression, objects within a set switching distance are detected, without being impeded by the reflective background, and nearly independent of color and surface of the object (object reflection). Background suppression is achieved by cutting the beam from the emitter to the receiver. To do so, it divides the visible field into an active area and the background. In addition, by dividing the receiver into at least two adjacent areas (e. g. by using a dual diode or a PSD- element) and by means of a geometric arrangement (triangulation), the actual position of the object within the sensing range can be determined. Through this, the object and the background can be distinguished accurately. Diffuse sensors with background suppression are characterized by low gray value shift and hysteresis.

stable

unstable

stable

Switching threshold

Stability (green LED)

Alarm

Receiver

EmitterBeam splitter

Detection- area

LensReflector



Light Source Code: G = Green R = Red RG = Red or Green X = not possible

Beam Pattern In the operation of thru-beam and retroreflective sensors, a degree of deviation from absolute align ment of the emitter and receiver (within which the beam intensity is sufficient to activate the receiver) determines the beam pattern.

Color Mark Detector A sensor designed to differentiate between different colored marks, or between a color mark and the background color it appears on. The contrast between the two marks, not the true color of the mark, is used for this detection. The color mark detector is available with either Red or Green LED emitters for this purpose.

Color Registration/Mark Detection Proximity (diffuse) sensing mode that detects the contrast between two colors on a surface.

Color Registration Sensor The color registration sensor is a highly specialized diffuse proximity sensor that has the ability to detect fine changes in contrast on a surface. But unlike the standard diffuse proximity sensor, this type of unit uses a powerful lens system and must be positioned at a specific focal distance from the target.

Complementary Outputs Sensors with both N.O. and N.C. outputs that change state simultaneously.

Component System Separately mounted optical sensing head and amplifier used for remote sensing applications.

Constant Current Source Source which provides constant current to the output of a sensing transistor, and allows the voltage at the output to vary from zero up to the supply voltage.

Contamination Contamination reduces the specified response range of sensors and fiber optics compared to clean air, (influence on the response range) because the dirt- and dust particles

■■ deposit on the lenses and impair their light transmission,

■■ and absorb and scatter light in the beam path. An oil-free source of compressed air can be used to prevent the effects of dirt and contamination due to impure air.

Contamination indicator The contamination indicator (green) lights in the safe zone if the input energy exceeds the threshold energy by at least 30 %. The threshold energy, at which a signal change affects the output, is defined at 100 %. From this, the safe zone results

■■ if the input signal exceeds at least 130 % of the threshold energy

■■ if the input signal exceeds at least 70 % of the threshold energy.




Contamination indicator The contamination indicator (green) lights in the safe zone if the input energy exceeds the threshold energy by at least 30 %. The threshold energy, at which a signal change affects the output, is defined at 100 %. From this, the safe zone results

■■ if the input signal exceeds at least 130 % of the threshold energy

■■ if the input signal exceeds at least 70 % of the threshold energy.

Correction factors For objects with varying reflection characteristics, the range can be determined by using the cor- (for diffuse sensors) rection factors shown. See the adjacent table.

Current Consumption Maximum amount of current required to properly operate a sensor.

Current Sinking NPN output - an output type such that when it is ON, current flow is from the load into the device’s output, then to ground. Output is normal high. The sensor “sinks” current from the load through the sensor to ground. The load is connected between the positive lead of the supply and the output lead of the sensor.

Current Sourcing PNP output - an output type such that when it is ON, current flow is from the device into the load. Output is normally low. The sensor “sources” current to the load. The load is connected between the output lead and the negative ground lead of the supply. Considered safer than NPN outputs due to the way current flows when wired up.

Dark Operation (Mode) Dark mode output is energized when the target is present (proximity output is energized when target is not detected). Output mode that will result in an output from a device when light from the emitter is not being received upon the receiver. The beam is being interrupted, thus creating an output.

Degree of contamination

Detectable Object Refers to the requirements of an object size, reflection qualities, light transmission properties, in order for that object to be detected by the photoelectric sensor.

Output (red LED)

Dar

k-on

Ligh

t-on

stable

unstable

stable

Switching-threshold

Stability (green LED)

Correction factor Object, surface1 Paper, white, matte 200 g/m²1.2...1.6 Metal, shiny1.2...1.8 Aluminum, black anodized1 Styrofoam, white0.6 Cotton fabric, white0.5 PVC, gray 0.4 Wood, rough0.3 Cardboard, black, shiny0.1 Cardboard, black, matte

Pure air Ideal conditionsTrace contamination Relatively clean air in indoor rooms

Slight contamination Workshop- and storage rooms

Moderate contamination Dirty and dusty environments; switching distance is reduced to s = 0.5 su

High contamination Heavy precipitation, whirled-up particles and swarf: Functional failure of the photoelectric sensor is possible.

Highest contamination Coal dust precipitating on the lens. Photoelectric sensor function may fail.



Differential The distance between the operating point and the release point as the target is moving away. It is expressed as either a linear dimension or in number of degrees. The distance between the operating points where the target enters the sensing field (sensor energizes) to the release point (sensor re-energizes). All discrete sensing technologies must have a differential. In some technologies, differential occurs as a by-product of the basic laws of physics; however, in other technologies it must be manufactured through additional circuitry. Photoelectrics - The distinctive property of a photoelectric sensor that results in the operation point being different from the release point. This distance is expressed as a % of the total sensing distance of the photoelectric sensor. It is the distance difference between the operating point when approaching the photoelectric and the release point when moving away from the photoelectric.

Diffuse Where the unit senses the light directly from the target. The emitter and receiver are in the same housing, the same as retroreflective; however, the receiver is more sensitive to the weaker light that is diffused by the surface of the target.

Directional Angle The angular range within which an emitter, receiver, emitter/receiver pair or reflector can be rotated or shifted about on the optical axis and still have the photoelectric properly operate.

Double Pole Double Throw (DPDT) Sensors that make and break two separate circuits. This circuit provides a normally open and normally closed contact for each pole.

Dynamic Optical Window Thru-beam sensors in an array used to detect moving parts in a confined operating space while ignoring non-moving parts.

Effective Sensing Distance This is the actual sensing distance realized by the sensor installed in the actual application. The effective sensing distance will be no less than the usable sensing distance, and is usually closer to the nominal in average circumstances.

Emitter A device that emits light when an electric current is passed through it. Emitters can give off visible light (red, green, blue, white) but the majority used for industrial applications emits invisible electromagnetic waves (infrared).

Emitter light Photoelectric sensors use mainly the following transmission components:■■ Red light LED: Visible light, well-suited as an orientation aid and for sensor adjustment.■■ Infrared LED (IR): Invisible beam with high energy.■■ Red light laser: Visible light, optimal for detecting small parts and high ranges due to the physical properties of the laser.




Excess Gain The measure of light energy striking the receiver above the threshold required to activate the reeiver. Excess gain is used to predict the performance of optical sensors in various environments.

Excess Gain Ratio Maximum light available at a given distance. Level of light intensity needed to operate the photoelectric sensor.

Fiber Optic Cables Optical conductors are made of glass or plastic with a diameter of as little as 50 µm and bunched in bundles of several hundred individual fibers to form so-called fiber optics. The fiber ends are ground and polished to meet the quality criteria of the optical industry. The individual fibers are coated with a very thin layer of lubricant. This reduces friction against the outer jacket and between the fibers, so that broken fibers are prevented even when the cable is continuously flexed. The transmission properties are guaranteed through this over a long span of time. The ends of the bundles are potted with the connection sleeve and the jacket. Balluff fiber optics thus have an IP 67 rating (IP 65 for metal jacket). Moisture and aggressive media cannot hurt either the fibers or the slide coating, so the optical properties remain unaffected. This design distributes axial pull forces evenly over all the fibers, and protects the individual fibers from excessive pull loads. Polyurethane jacket

■■ Temperature T = +85 °C ■■ Excellent chemical resistance■■ Flexible■■ No embrittlement from oils and cooling emulsions.

Corrugated metal tube, silicon jacketed■■ Temperature T = +150 °C■■ Highly flexible■■ Crush-resistant■■ Can be sterilized.

Metal jacket■■ Temperature T = +150 °C■■ Resistant to hot swarf■■ Flexible■■ Crush-resistant



Fiber Optic Sensing The use of fiber optic cables and a fiber optic amplifier to remotely sense in either a confined location or an environment that a normal sensor will not function (High temperatures, chemicals).

Fixed Focus A diffuse reflective photoelectric sensor that the optical axis of the emitter and receiver is adjusted to a focal point or it utilizes an aperture to focus on an area in front of the sensor.

Focusable Diffuse A diffuse reflective photoelectric sensor that either allows the optical axis of the emitter and receiver to be adjusted to a focal point or it utilizes an aperture to focus on an area in front of the sensor.

Fork sensor Fork sensors are through-beam designs in which the emitter and receiver are arranged across from each other in a U-shaped housing. Through the housing type, alignment and electrical connection are simplified. Different ranges are available by selecting different housing configurations. Fork openings of 5...220 mm are possible in various increments. The built-in potentiometer and apertures allow you to adjust the fork sensors easily for detecting parts down to a diameter of 60 µm.

Gray value shift Gray value shift is the switching distance difference when calibrating using different object reflectivities. The sensor is calibrated for a distance using a Kodak-gray card with 90 % reflection. With the Kodak-gray card with 18 % reflection, the distance achieved with it is measured. The difference between these two switchpoints in % is referred to as the gray value shift. The smaller the gray value shift, the more color-independently the sensor operates.

Hysteresis The distance between the operating point and the release point as the target is moving away in order to make a precise determination of target presence without factors of the environment intervening to create a noisy output signal. (see Differential)

Interface Translates the presence of a target into an electrical signal.

Internal Reflection Internal reflection occurs whenever a light ray strikes the surface of a medium whose refractive index is less than that of the medium in which the light is traveling. An example of this is a light source in water, where light is internally reflected from the surface of air. The amount of light that is reflected depends upon the angle at which it hits the surface. The critical angle is 49°. At this angle the ray of light is completely contained within the medium.

Lasers, laser class The purpose of laser protection classes is to protect persons from laser radiation by specifying limit values. Based on this, the lasers used are classified according to a scale reflecting the degree of hazard. The calculations and associated limit values relevant for the classification are described in the standard EN 60825-1:2001-11. The grouping is based on a combination of output power and wavelength, taking into account emission duration, number of pulses and angle extension.

Balluff sensors work in the following laser protection classes: Class 1: Not dangerous, no protective measures. Class 2: Low output, lid-closing reflex sufficient for protection. With devices of protection class 2, the eye closes on its own due to the lid closing reflex before it has been open to the beam for too long. Laser warning signs on the device and possibly also on the machine in which a laser is being used are sufficient. Additional protective measures are not required. When using devices of protection classes 1 and 2, no laser safety officer is necessary in the company.

Lateral Approach When the target to be detected approaches the sensing face from the side (slide by).

Leakage Current The amount of current that flows through, or leaks from, the output of an energized device when the device is in the OFF state. Most common problem involves leakage current when a device is wired as an input to a programmable logic controller. Leakage current should be less than 1.7mA.

LED (Light Emitting Diode) Solid state device that produces visible red, green or yellow light or invisible infrared light radiation. Indicator on a sensor that emits visible light to show operation of the unit. Infrared types are used for emitters. Red or green types are used also as emitters in special applications (polarized, plastic fiber optics, etc.)




Light Incident The condition met when light from the emitter is reaching, or incident upon, the receiver.

Light Interrupted The condition met when light from the emitter is not reaching, or incident upon, the receiver.

Light Operation (Mode) Light mode output is energized when the target is not present (proximity output is energized when target is detected).

Output mode that will result in an output turning ON when light from the emitter is incident upon the receiver.

Light Refraction Light beams experience a change in direction (interruption) at the border between two optical media with different optical thicknesses(e.g. glass/air). The degree of interruption depends on the quotients of the optical thicknesses of both media and on the angle of incidence to the optical axis.

If a light beam travels from a dense medium, n, into a thinner one, n’, its course there will show a greater angle ’. However, above crit. (boundary angle at which the broken beam runs parallel to the boundary layer), it again enters the medium with the thickness n; this means that a total reflection is pending.

Light Source Type of light used in the emitter portion of the photoelectric. Most common, pulse modulated LED or incandescent lamp.

Light transmission Without the total reflection at boundary layers described above, by total reflection fiber optics of today’s quality would not be feasible. They consist of a cylindrical, light-conducting core and a surrounding thin-wall jacket. The optical density n of the core is greater than that of the jacket. A light beam is always completely reflected at the junction between core and jacket, and can therefore never leave the core in a radial direction. Theoretically, the light is not weakened by these reflections; however, contamination and small defects both in the core material as well as the boundary layer do cause losses (attenuation) and effectively limit the fiber optic length over which reliable information can be transmitted.

Line-Powered Sensor A sensor that draws its operating current directly from the line. Its operating current does not flow through the load, and a minimum of three (3-wire) connections is required. A 4-wire has complimentary outputs and requires four connections.

Loads There are basically two different kinds of loads: Resistive - Lamps, heaters, solid state PLC input modules Inductive - Relays and solenoid valves

Load-Powered A sensor that draws its operating current (leakage current) through the load. The sensor is always in series with the load and only two connections are required.

Method of Detection Sensing technique used by the photoelectric sensor. Three types - Thru Beam, Retroreflective, or Diffuse Reflective.

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Minimum Load Minimum current that the external load must draw to ensure proper operation of the photoelectric sensor. Most often associated with standard AC 2-wire devices.

Luminescence To locate invisible marks on objects, so-called luminescent materials (contained in special chalks, inks, paints etc.) are used which can only be made visible under ultraviolet (UV) light. The fluorescent materials convert the invisible UV light (short wavelength, here 380 nm) into visible light (between blue 450 nm and dark red 780 nm). This effect is called photoluminescence. The visible light can then be detected as usual by the receiver component of the sensor.

Maximum Load The most current that can flow through a device continually without damaging the device.

Method of Detection Sensing technique used by the photoelectric sensor. Three types - Thru Beam, Retroreflective, or Diffuse Reflective.

Minimum Load Minimum current that the external load must draw to ensure proper operation of the photoelectric sensor. Most often associated with standard AC 2-wire devices.

Modulated LED Pulsations of light at a specific frequency reduce interference from ambient light and increase sensing distance.

Mutual Interference A feature in photoelectric sensors that eliminates false-signaling between similar protection sensors mounted next to (or in close proximity to) each other. N.C. (Normally Closed) Current flow through the sensing device is possible only when the device is in the off state or de-energized. Contacts are closed when the sensor is not operated and when there is no external force on the actuator. The sensor opens a circuit to the load when a target is detected or sensor is operated.

N.O. (Normally Open) Current flow through the device is not possible when the device is de-energized (turned OFF). Contacts are open when the sensor is not operated and when there is not external force on the actuator. The sensor closes a circuit to the load when a target is detected or sensor is operated.

Nominal Sensing Distance The rated operating distance for which the sensor is designed. This value should only be taken as a guide, since no manufacturing tolerances or changes in external operating environment are taken into account.

You should be aware that manufacturers arrive at performance standards for their products using standardized criteria so you can compare “apples to apples” in determining which product is right for your application. These criteria reflect, to a reasonable extent, the real performance that can be expected in an “average” con trolled environment.

Non-Incentive Unable to release sufficient electrical or thermal energy under normal operating conditions to cause ignition of specific hazardous materials. Non-incendiary equipment can be used without additional precautions in Division 2 hazardous locations where the hazardous materials can be present only in case of accidental rupture or breakdown of the enclosure containing them.

Non-Inductive Ratings This rating indicates the resistive load only that the contacts can make or break. Resistive ratings are generally based on a 75% power factor for AC.

NPN A transistor having an n-type semiconductor as its emitter and collector and a p-type semiconductor as its base.

Observable Time Observable time is the real time that the target can be observed by the sensor.

Off Delay The time required for the interface to trigger a change of state when a target is removed from the sensing area.

On Delay The duration of time required for the interface to trigger an output change of state when a target is introduced to the sensing area.

One-Shot An output signal produced for a preset time that is independent of the duration of the input signal. It may begin at the start of the input signal or be delayed.

Opaque Material which neither reflects, emits, nor allows light to pass through it. Photoelectric controls easily detect opaque objects.

Operating Distance The distance from the sensing face to the plane of the target’s path once it reaches the operating point.

Basic Information and DefinitionsPhotoelectric sensorsBasic Information and DefinitionsPhotoelectric sensors



Operating Mode Two possible modes that will cause the sensor to operate and produce an output: Light-ON or Dark- ON mode.

Operating Point The point at which a target is sensed as it approaches the sensing field of the sensor. Also called the “trip point.”

Operating Range The range in the x, y, and z plane that will cause the sensor to operate when a detectable object is in it.

Output Circuit Interfaces with data acquisition systems (PLCs, dedicated controllers, etc.) or other control circuits (relays, counters, timers, etc.).

Output Transistor A semiconductor device used to provide ON/OFF sensing of external loads.Photoelectric Sensor A light sensitive device that converts visible and infrared light waves into an electrical signal. A no-touch sensor consisting of a light emitter and detector. Its output turns on or off, depending on the absence or presence of this light at the detector that is determined by the absence or presence of a target.

Permitted humidity The permitted humidity is 35 to 85 % (not condensed). With diffuse types, the emitter and receiver are integrated into a single housing. The alignment to a detection object is largely uncritical. A target object (e. g. a standard target which is 90 % reflective) bounces a part of the light from its surface back to the receiver. If the standard target reaches the response curve (see image), the output signal changes. The sensing distance depends on the size, shape, color and properties of the reflective object surface. Using a Kodak-gray card with 90 % reflectivity (like white paper), distances of up to 2 m can be obtained.

Power-Up Delay A target is present in the sensing area when power is applied, the output state does not change. For confidence, the delay must last longer than the duration of any start-up transient.

Proximity Diffuse Sensing mode with emitter and receiver in the same housing. Light is bounced back at the receiver by the target. Also called direct detection.

Pulse Modulated Light sources that are pulsed (ON/OFF) at a high frequency by an oscillator circuit. The receiver of a pulse modulated photoelectric only receives light at that frequency, thus minimizing interference from ambient light.

Receiver A device that changes its electrical characteristic when light is received. Receivers can be photovol taic cells, photo-transistors, photodiodes, and photoresistors.Release Point The point at which a sensor returns to its original state as the target leaves the sensing field. Also called “reset point.”

Pilot Duty Rating of contacts when making or breaking inductive loads such as coils and solenoids; based on a .35 power factor.

PNP A junction type transistor having a p-type semiconductor as its emitter and collector and an n-type semiconductor as its base.

Emitter/Receiver

Actual beamEmitter-/receiver beam

Standard target 90 % reflective



Polarity reversal protection The power supply connections can be reversed without destroying the sensor. In combination with the short-circuit protection, there is protection against total reversal.

Polarized Visible light from the emitter of a retroreflective photoelectric sensor that is filtered so as to be projected in only one plane. The receiver of a polarized unit is filtered to accept only light that is reflected perpendicular to the emitted light. Corner cube reflectors are required to properly rotate the emitted light source.

Polarizing filters When do you need them? A part of the emitter light in retroreflective systems is reflected directly back to the receiver from target objects with shiny surfaces, e. g. stainless steel, aluminum or tinplate. Simple Retroreflective light sensors can therefore not reliably distinguish reflected light from the object and reflected light. Erroneous readings therefore cannot be ruled out. For this reason, Balluff retroreflective light sensors are alternatively equipped with polarizing filters, 0which, together with a Balluff reflector, an optically activated prismatic mirror, form a selective barrier against the reflected light from the object, but still allow the reflector light to occur.

How do they work? Light consists of a wide variety of individual beams, which all sinusoidally oscillate on their dispersal axes. Their oscillation levels, however, are independent of one another and can take on any angle position desired (see image). If they meet a polarizing filter (fine line grid), then only the beams oscillating parallel to the grid level are let through, and the vertically oscillating ones are entirely deleted. Of all the other oscillation planes, only the portion which consists of parallel components is allowed to pass.

To suppress mirror reflections Behind the filter, the light only oscillates parallel to the polarization plane. For this light, an additional 90º rotated polarizing filter becomes an impassable barrier. With a 90º rotated polarizing filter in front of both the emitter and receiver of a retroreflective system, you can therefore prevent the reflected light of a reflecting target object from falsely triggering the signal of the photo-receiver.

For reliable detection of reflective target objects On the other hand, the light reflected from the triple mirror, with its polarization plane rotated by 90º as described above, is allowed to pass unhindered by this filter. The receiver of a retroreflective system is thereby fully shielded even when a reflecting target object enters the beam, so that the object is still reliably detected.

Polarized Retroreflective A retroreflective system that can detect, in addition to normal opaque objects, the shiny objects that fool a normal reflex sensor. This includes mirrors, metal straps, foils, metal boxes, cans, shrink-wrap and Mylar tape.

Power Consumption Maximum amount of power required to properly operate the device.Power-Up Delay A target is present in the sensing area when power is applied, the output state does not change. For confidence, the delay must last longer than the duration of any start-up transient.




Proximity Diffuse Sensing mode with emitter and receiver in the same housing. Light is bounced back at the receiver by the target. Also called direct detection.

Pulse Modulated Light sources that are pulsed (ON/OFF) at a high frequency by the oscillator circuit. The receiver of a pulse modulated photoelectric only receives light at that frequency, thus minimizing interference from ambient light

Receiver A device that changes its electrical characteristic when light is received. Receivers can be photovoltaic cells, photo-transistors, photodiodes, and photoresistors.

Reflectors The two-dimensional principle of retroreflection described above (optically active triple mirrors) can be carried over to a spatial system with three mirrors which are oriented at right angles to each other (one corner of a cube standing on its point). A light beam entering this system is totally reflected by all three surfaces and exits parallel to the incident beam. Triple mirrors are called optically active, because they also turn the polarization level of the reflected light beam by 90°. This property first enables a secure recognition of reflective detection objects, together with a polarization filter with retroreflective light sensors.

Each six triple mirrors are to be arranged into a hexagon and arranged in a honeycomb next to each other. Their orientation with respect to the light beam is then totally unproblematic. These are generally made of plastics with high optical density, injected as sheets or pressed into flexible tape.

Reflection What is it? Light beams extend to a straight line in free space. Upon striking an object, they are reflected. Depending on the surface composition of the object, one of three types of reflection occurs: total reflection, retroreflection, and diffuse reflection.

The total reflection reaches a highly reflective (mirroring) surface. The angle of incidence is thereby the same as the angle of reflection I = E ). The reflection losses are in the ideal case negligible.

The retroreflection is caused by two mirrors aligned vertically to each other. A light beam is again projected back through double reflection in the same direction. The angle of incidence can thus be altered in a relatively wide range.

Diffuse reflection occurs on an uneven and rough surface. It can be illustrated through a wide variety of poorly reflective and differently aligned miniature mirrors. Incidental light is widely “scattered” from such a surface. The reflection losses are higher the darker and more matte finished the surface is. Diffuse sensors, for example, detect diffuse reflecting light from target objects.

Basic Information and DefinitionsPhotoelectric sensorsBasic Information and DefinitionsPhotoelectric sensorsBasic Information and DefinitionsPhotoelectric sensors


Release Point The point at which a sensor returns to its original state at the target leaves the sensing field. Also called “reset point”.

Repeatability A measure of the maximum variance in the operating distance that can be experienced in successive operations of a sensor under specified operating conditions.

Repeat Accuracy The measure of variation in operating distance between successive operations under constant operating conditions. This measurement is often expressed as a maximum percentage of the “operating distance” (i.e., 5%). Note: The target must also remain within the sensing field long enough to allow the load sufficient time to respond to the output signal of the sensor.

Resistive Ratings This rating indicates the resistive load only that the contacts can make or break. Resistive ratings are generally based on 75% power factor for AC.

Response Time It is defined as being the duration of time required for the interface to trigger an output. Measure of time lapse between receipt of an input signal by a receiver to the activation of its putput.

Retroreflective With retroreflective light sensors, the emitter and the receiver are in a single housing. A reflector on the opposite side of the beam bounces the emitter‘s light back to the receiver. A target object interrupts the reflected light beam and causes a change in the output signal. With reflective interfaces, it is advisable that the light reflected from the object is to be blanked out with a polarizing filter in front of the receiver optics, in order to prevent possible error signals.

Reverse Polarity Internal circuitry that protects a device from being ruined if proper polarity of voltages is not maintained when wiring the device.

SCP Short Circuit Protection without external fusing. In DC it also includes overload protection.

Sensing Distance The maximum distance at which, under specifications, a photoelectric sensor can detect a target.

Sensing Mode Dark or Light mode condition to the receiver in activating its output.

Sensing Range The maximum operating range at which the sensor will reliably detect a standard target under conditions of nominal voltage and temperature. The distance between an emitter and a receiver, reflector, or object in the path of the beam within which nominal operation is achievable.

Short-circuit protected The output leads can be connected to the wrong potential without destroying the sensor. Together with their polarity reversal protection, these sensors are completely protected against miswiring.

Short Circuit Protection Internal circuitry that protects the solid state sensor in the event that the protection load becomes shorted.

Sinking A device that swtiches the negative supply voltage to a load wired to the positive supply voltage. NPN type sensor.

Slot Sensor A self-contained thru-beam sensor shaped like a slot or fork. The spacing between the emitter and receiver can vary.

Solid State A device, circuit or system whose operation is dependent upon any combination of optical, electrical, or magnetic phenomena within a solid—generally referred to as having an infinite life and no moving parts.

Sourcing A device that switches a positive voltage to a load wired to the negative supply voltage. PNP type sensor.

Reflector

Target

Emitter/Receiver




Specular Reflection The perfect, mirror-like reflection of the light off of a target’s surface.

Stability The output state of the photoelectric is stable ON, unstable, or stable OFF. Unstable outputs cause the system to perform erratically. Unstable output occurs when the amount of light incident on the receiver is near the trigger level of the device.

Standard Target An object with standardized dimensions or characteristics — common among manufacturers — used in the product laboratory to determine benchmark performance characteristics for a sensor.

Supply Voltage The nominal voltage, or voltage range, at which the device is designed to be operated continuously.

Switching distance s The switching distance is the distance between the standard target and the “sensing surface” of the light sensor for causing a signal change (per EN 60947-5-2).

Rated switching The rated switching distance is a switching distance- characteristic, which does not take into account manufacturing tolerances, sample differences, operating temperatures, supply voltages, etc.

Real switching The actual switching distance distance sr is the switching distance at measured voltage Ue, taking into account the manufacturing tolerances at an ambient temperature of (T = +23 °C ±0.5).

Usable switching The usable switching distance is the permitted switching distance within fixed voltage- and temperature limits (0.80 sn ≤ su ≤ 1.20 sn).

Blind zone The blind zone is the range between the sensing surface and the minimum switching distance in which a detection object cannot be detected.

Detection range sd The detection range is the area in which the switching distance of a photoelectric sensor to the standard target can be set.

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Teach-in Sensor settings are no longer carried out with potentiometers or slide switches with Teach-in-sensors. Everything is controlled by pressing a button. The microcontroller integrated in Teach-in-sensors enables the complete control of the setting process by buttons. Through defined setting steps, there is the advantage that the sensor cannot be set in an unreliable range. The micro controller also assumes control of the contamination indicator and the contamination output. A wide variety of Balluff Teach-in-switches have remote control; the setting process via Teach-in can also be triggered externally via cable.

Technical data, general

Temperature drift The temperature drift is the switching point shift at temperature changes in % of sr.

Test input The test input of the emitter interrupts its light impulses and, through that, enables the function check of emitter and receiver. If Test+ is used, then Test– has to be at 0 V, and if Test– is used, then Test+ has to be placed at 10...30 V. The receiver-output has to switch every time if there is a voltage of 10...30 V DC (Test+) or 0 V DC (Test–) at the test input. Contamination or maladjustment of the optical axis causes the emitter signal to reach the receiver only weakly, if at all. Therefore, the output will not switch, even though the test input is activated. The test function corresponds to a remote monitoring of the photoelectric sensor and enables a preventive system control.

Thru-Beam Through-beam sensors consist of separate emitter- and receiver units which have to be aligned opposite each other at the two sides of the detection range. A target interrupts the light beam and causes the receiver to switch, regardless of the surface characteristics. In unfavorable conditions (e.g. dust, moisture, oil), you achieve the best results with through-beam sensors. Ranges of up to 50 m can be achieved.

Timing Links the trigger and the output circuit. The time duration of this link can be as fast as technology will permit, or controlled for a desired effect.

Translucent Material which permits the passage of light to some extent.

Transmission The transmission is a measure for the light transmission ability of a medium. It is defined as the ratio of: – passed to – entering light (in %). Diffuse transmission is the term which is used when the light is partially or completely diffused.

Transparent Targets that permit transmission of essentially all incident light.

Triangulation With a triangulation, the emitter- and the receiver beam are cut by a photoelectric sensor at a pointed angle. A target object will only be detected in the range where the beams overlap.The emitter light which is reflected or diffused from objects outside this limited zone cannot be registered by the photo-receiver. With the triangulation, relatively small changes in distance can be recognized (e.g. slots, offsets on shafts). Color and shape of the object have very little effect on the registration.

Trigger or Threshold Level Triggers the output circuit when the signal reaches a predetermined level.

Turn-off delay The turn-off delay is the time which the sensor requires for actuation when the target object leaves the sensing zone, at a transmission efficiency factor of 0.5.

Photoelectric sensor Background suppression Retroreflective sensor Through-beam sensorRated switching distance sn 100 mm 200 mm 400 mm 1 m 2 m 120 mm 250 mm 1.1 m 2 m 4 m 8 m 5 m 8 m 16 m 50 mActual switching distance (in % of sn) 125 125 125 135 150 135 135 135 150 150 150 150 150 150 150Switching hysteresis (in %) ≤ 20 ≤ 20 ≤ 25 ≤ 15 ≤ 15 ≤ 1 ≤ 1 ≤ 1 ≤ 10 ≤ 10 ≤ 10 ≤ 15 ≤ 15 ≤ 15 ≤ 15Ø the response beam at sn/2 typical (mm) 20 25 150 300 300 6 10 25 50 100 150Ø of the active area (mm) 8 12 12 20

Target

Emitter

Receiver

Target

Emitter Receiver




Turn-on delay The switching delay is the time which the sensor requires for actuation when the target object leaves the sensing zone, at a transmission efficiency factor of 2.

Usable Sensing Distance Taking the actual operating conditions into account, the usable sensing distance is the maximum reliable operating range for a given system. The most important factors to consider are atmospheric environment and the reflective nature of the target.

Visible Light Measured in wavelength. Wavelengths of visible light range between 400 and 700 nanometers.



Basic Information and DefinitionsCapacitive sensors

Ambient temperature Ta The ambient temperature determines the temperature range in which the sensor may be operated. Balluff manufactures both sensors for the standard temperature range –30...+70° C and sensors for more stringent temperature requirements up to max. +250° C.

Effective switching distance sr The real switching distance is the switching distance of a single proximity switch measured under specified conditions such as flush mounting, rated operating voltage Ue, temperature Ta = +23 °C ±5 °C. For capacitive sensors, the effective switching distance sr can be set using a potentiometer.

Flush-mount (shielded) Flush mountable sensors can be installed with their sensing surface flush to the metal. The distance Proximity switches between two proximity switches (in row mounting) must be ≥ 2d.

Hysteresis The hysteresis is the difference in distance between the switch-on point (for an object that is approaching) and the switch-off point (for an object that is receding).

Switching distance

Hysteresis




Operating principle The non-contacting capacitive sensor converts a variable of interest in technical production terms (e.g. object or level) into a signal which can be processed further. The function is based on the alteration in the electrical field around its active zone. The sensor is comprised essentially of:

■■ Sensor electrode and shielding■■ Oscillator■■ Demodulator■■ Trigger■■ Output driver

These two electrodes form the open capacitor of the sensing surface. This is part of an RC oscillator.

When metallic or non-metallic objects approach the sensing surface of the capacitive sensor, the capacitance changes and the oscillator begins to oscillate. This causes the trigger stage down stream of the oscillator to trip, and the switching amplifier to change its output status. The switching function at the output is either an N.O., N.C. or changeover contact, depending on the type of unit involved. The function of the capacitive sensor can be explained using the equation for capacitance: C = 0 × r × F × (1/S) r: Relative dielectric constant (property of the target medium) 0: Absolute dielectric constant, unchanging F: Area S: Distance

From the formula above it follows that objects which have a sufficiently large relative dielectric coefficient (r) and area will be detected by the capacitive sensor. Besides the standard (multi-purpose) sensor technology, in which the sensor is a part of the oscillator circuit, there are also more modern processes designed to meet special application requirements.

Operating conditions If an electrically non-conducting actuation element (target) enters the sensor field, the capacitance and correction factors changes proportionally to r and to the immersion depth or to the distance to the sensing surface. Since the rated switching distance sn is based on a grounded standard target made of Fe 360, the switching distances must be corrected when using other materials.

Sensor field and electrode

Oscillator Demodulator Trigger Output driver

Sensing surface

Shield

Sensor electrode

Correction factors for typical materials

Correction factors should be determined using the target material directly.

Metal 1

Water 1

Glass 0.4...0.6

Ceramic 0.2...0.5

PVC 0.2...0.47

Lucite 0.39...0.45

Polycarbonate 0.26...0.4


Opposing The opposite installation of two sensors requires a minimum distance of a ≥ 4d between the sensing Installation of two sensors surfaces.

Output current The output current is the maximum current with which the output of the sensor may be loaded in or operating current Ie continuous operation.

Polarity reversal protection The sensor electronics are protected against possible polarity reversal or interchanging of the connection wires.

Rated switching distance sn The rated switching distance is a parameter without taking manufacturing tolerances, parameter scatter and external influences such as temperature and voltage into account.

Repeat accuracy Repeatability is the maximum sensing distance differential between any two measurements, measured within 8 hours with multiple “approaches” to the object being scanned. The repeat accuracy generally lies between 2 and 5% of the effective switching distance sr.

Residual ripple The residual ripple is the maximum permissible AC voltage which may be superimposed on the supply voltage US without affecting the function of the sensor.

Sensing surface The sensing surface is the area through which the high-frequency sensor field enters the air space. It is determined mainly by the surface area of the cover cap and corresponds approximately to the area of the outer sensor electrode.

Sensors for level detection These sensors have a spherical electrical field. These units are(non-flush/unshielded designed to detect the product, bulk goods or liquids (e.g. sensor version) granulate, sugar, flour, corn, sand, or oil and water) with their sensing surface, by touching the medium or through the container wall. The choice of the appropriate sensor depends on the operating conditions and the kind of medium and should in each case be tested beforehand with samples.

Sensors for object detection These sensors have a straight-line electric field. They recognize (flush) fixed bodies (e.g. wafers, components, circuit boards, hybrids, cartons, stacks of paper, bottles, plastic blocks and boards), measure liquids through a separating wall (glass or plastic, thickness max. 4 mm) and, in individual cases, are to be pre-tested with samples.





Shielded sensors Normally, the rectilinear field of flush-mounted sensors scans objects from a distance. To ensure flawless switching of the sensor, the maximum switching distance must be checked before using the device. The following example applications show how you can do this.

Detecting solid bodies made of different materialsA shielded capacitive sensor will be used to detect a ceramic plate. The sensor is set to the maximum rated switching distance sn of, for example, 4mm from metal or by approximation from your hand. With this preset distance of 4 mm, move the sensor towards the ceramic plate. The rated switching distance sn to the ceramic plate has been reduced to approx. 2mm.

The distance of 2 mm is now the maximum permissible switching distance for the ceramic plate. You can also adjust for smaller sensing distances than 2mm.

Important!To ensure that our sensors work reliably within their technical specifications, they have a greater sensing distance than the indicated maximum rated switching distance sn. If the user now adjusts the switching distance for the above described ceramic plate to 4mm, the sensor will operate outside the permitted range. This entails a risk that temperature and other environmental factors, plus electrical interference in the mains, may lead to faulty switching by the sensor.

Sensing levels through container wallsA shielded capacitive sensor will be used to detect a liquid, e.g. water, through the con-tainer wall. This partition wall may only be made of glass or plastic. The basic calcula-tion for the thickness of the wall thickness yields a value in millimeters of approx. 10 to 20% of the switching distance, but max. 4mm (for standard sensors).

The sensor's face (sensing surface) is now glued to the glass or plastic wall or mounted on it in a maximally form-fitting configura-tion. The tank is then filled with water until approx. 30 to 50% of the sensor's sensing surface is covered.

Particularly when small and ultra-small quantities of liquid are being scanned, and if the sensor has not been mounted in a form-fitting configuration (flat sensor surface on a tank wall with a small radius), 30% should be selected as the coverage area. Now turn the sensor's potentiometer counter-clockwise (lower sensitivity) until the sensor switches off (for NO versions "LED OFF"). Now turn the potentiometer clock-wise again (higher sensitivity) just enough until the LED, and thus the output signal, switch on again. Using the calibration pro-cess described here ensures that the sensor does not detect the wall or the media residues on the wall, but only switches when the liquid has again reached the above-described level of 30 to 50%.

Metal

Ceramic

Ceramic

Wall thickness (max. 4 mm glass or plastic)

Water



Short-circuit protection All DC sensors feature this protection device. In the event of overload or short-circuit at the output, and overload protection the output transistor is automatically switched off. As soon as the malfunction has been corrected, the output stage is reset to normal functioning.

Standard target The standard target is a grounded, square plate made of Fe 360 (ISO 630), with the switching distance determined per EN 60947-5-2. The thickness is d = 1 mm; and the side length a corresponds to

■■ The diameter of the registered circle of the “sensing surface” or■■ 3 sr, if the value is greater than the given diameter.

Standby current The no-load supply is the power consumption of the sensor with a maximum operating voltage UO and with no connected load.

Supply voltage US The supply voltage is the voltage range in which flawless functioning of the sensor is assured. It includes all voltage tolerances and ripple.

Switching frequency The switching frequency is a succession of periodically repeated activation and de-activation of the sensor during an established interval (one second). Measuring method in conformity with IEC 60947-5-2.

Temperature drift The temperature drift specifies the amount by which the switching distance can change based on the temperature. This lies between 15 and 20% of the real switching distance sr (–5...+55 °C).



Unshielded sensors These capacitive sensors with their spherical electrical field are especially suited as level detectors for liquids, granulates or powders.

Sensing levels directly in the containerAn unshielded capacitive sensor will be used to detect a granulate in a tank. The sensor is now installed in the tank with its sensing surface (clear zone at the head as described in the catalog), in a configuration ensuring that the head is completely covered by the product.

Now turn the sensor's potentiometer counter-clockwise (lower sensitivity) until the LED, and thus the output signal, switch off. Now turn the potentiometer clockwise again (higher sensitivity) just enough until the LED, and thus the output signal, switch on again. Then turn the potentiometer another ¼-turn (90°-rotation) clockwise. This is to compensate for possible temperature fluctuations or changes in the moisture level of the product being scanned. If a medium has a high r, especially water, the sensor will react much more sensitively. Therefore, the adjustment should be made for around 50 to 80% coverage, or a sensor in the SMARTLEVEL series should be used.

Detecting levels of conductive liquids directly in the container or through a container wallThe ideal level sensors SMARTLEVEL de-tect liquid media directly and all conductive or adhesive liquids through thicker container walls. And they do it without adjustment as long as the wall thickness does not exceed 6mm. For thicker walls the SMARTLEVEL will need to be adjusted. Adjustment is pos-sible with the container empty or full.

Adjusting with a full container First fill the container and install the sensor on the container wall. Now the SMARTLEVEL has contact and turns itself on. Now turn the potentiometer slowly counter-clockwise until the sensor turns off. Now slowly turn the potentiometer (with the sen-sor switched off) clockwise until the sensor turns on again. At the turn-on point then turn the potentiometer another half-turn (approx. 180°) clockwise and the SMARTLEVEL sensor is adjusted.

Adjusting with an empty container Install the SMARTLEVEL sensor on the container wall. Now the SMARTLEVEL has contact and turns itself on. Now turn the potentiometer slowly counter-clockwise until the sensor turns off. Now slowly turn the potentiometer (with the sensor switched off) clockwise until the sensor turns on again. At the turn-on point the potentiometer only needs to be turned 3 times by approx. 360° counter-clockwise and the SMARTLEVEL sensor is adjusted.

Wall

Plastic granulate

With level sensors in the MicroLevel housing, an adjustment is only necessary in exceptional cases.This potentiometer has a setting path of 270° and has to be carefully adjusted > no limit stop.

Wall

Water

Wall thickness (max. 10 mm glass or plastic)

Water

With level sensors in the MicroLevel housing, an adjustment is only necessary in exceptional cases.This potentiometer has a setting path of 270° and has to be carefully adjusted > no limit stop.



Unshielded proximity switches The sensing surface must extend ≥ 2sn from the metallic installation medium. The distance between two proximity switches must be ≥ 2d.

Voltage drop Ud The voltage drop is the voltage measured across the active output of the proximity switch when carrying the operational current flows under specified conditions.




Basic Information and DefinitionsMagnetic cylinder sensors

Adjustment 1. Set piston to end position. and installation

2. Slide sensor (with power on) from the cylinder edge to the 1st switch-on point (LED on). Mark the edge of the sensor on the cylinder.

3. Continue to slide the sensor until the output is off (LED off).

4. Slide sensor back to 2nd switch-on point. Mark the edge of the sensor on the cylinder.

5. Install the sensor with the edge between the two

marked points.



Benefits Magnetic electronic cylinder sensors of the series BMF query the piston position with pneumatic and hydraulic cylinders and grippers.

Depending on the model, the sensor housing will be made of plastic, aluminum, brass or stainless steel.

Balluff offers a comprehensive variety of form factors and mounting brackets for your pneumatic cylinders with the BMF- sensors. Most require only one sensor model with various mounting brack ets for the different cylinder manufacturers and -sizes. This reduces your inventory costs. Mounting with our brackets allows sensors to be replaced without losing your switchpoints.

■■ Reliable, bounce-free switching■■ Long service life■■ Non-contact, wear-free piston sensing■■ Insensitive to contamination■■ Detects piston position through the cylinder wall■■ Space-saving design, small sizes and shapes■■ Can be installed on any common cylinder size with corresponding mounting bracket■■ Significantly greater switching distances for the same size ■■ Switches through alloy and aluminum walls without a reduction in switching distance■■ Magnet can be flush mounted in steel■■ Polarity reversal protected■■ Supply voltage 10...30 V DC■■ Responds to both magnetic field directions equally ■■ Semiconductor sensor, wear-free■■ Vibration-resistant■■ Short-circuit protected■■ Housing material is highly resistant to aggressive media

BMF V-Twin BMF V-Twin is a sophisticated and cost-effective plug concept with two sensors and a plug. During installation, you will reduce costs and gain back time.

Low initial costs compared to two individual sensors: BMF 204/214 approx. 20 % savings BMF 303/305 approx. 30 % savings BMF 307 approx. 35 % savings

Space in the splitter box for twice as many sensors.

Effective distance se The effective distance is the point in the middle of the linear range sI, used as a reference point for other specifications.

Function Permanent magnets are installed in the piston ring of the pneumatic cylinder, which recognize the magnetic cylinder sensor by the non-magnetic cylinder walls. As the piston approaches, the sensor changes its output signal state.




Installation notices It is recommended that the BIL and position encoder be installed- or attached to non-magnetizable materials, such as non-ferrous metals, austenitic steels, plastics, etc. This applies both to the instal lation of the sensor as well as the magnet.

Magnetizable materials may affect the geometry and strength of the effective sensing magnetic field.

Magnetic fields near the BIL can affect the output signal depending on their location and the strength of the output signal. This also applies to position sensors of neighboring BILs.

Recommended minimum distances from magnetizable materials or other BILs

Units in mm

Installation notices Magnetic Magnetic cylinder sensors are used chiefly on cylinders and grippers for monitoring the cylinder sensors piston position. The sensor detects the field from the magnet embedded in the piston. Thanks to non-contacting position detection, electronic magnetic field sensors from Balluff function reliably and without wear, with no contact erosion, no bouncing, no sticking and just one switching point. The piston position is reliably detected even at high traverse speeds.

Linear position sensors Displacement sensors with analog output are sensors that generate a continually varying output with analog output signal that depends on the distance between its sensing surface and the location of the position encoder relative to the sensor (BIL).

Linear range sI The linear range corresponds to the working range in which the displacement sensor exhibits a defined linearity.

Magnetic sensors for While for the magnetic cylinder sensors for pneumatic cylinders, the magnet is integrated in the object detection cylinder piston, an external magnet is needed for position sensing with cylindrical magnetic field sensors. Cylindrical magnetic field sensors are characterized by their small, extremely compact design and very high switching distances. This means that you can query positions up to 90 mm away in a non-contact method using a single sensor with a diameter of 6.5 mm. These sensors are industrial grade and resistant to soiling. Positions can also be retrieved through containers or pipes because magnetic fields can penetrate many non-magnetizable materials. The detection of codes using magnets is also possible.

Measuring speed Through measurement speed, the position (with BIL) of a linear moving object can be measured accurately. The direction of movement of the object is parallel to its sensing face.

Magnetic cylinder sensor BMF

Magnet ring

Non-magnetic cylinder wall made of aluminum or stainless steel



Mounting distances The response travel of a magnetic field sensitive Adjustment and installation sensor is virtually independent of the field strength of typical piston magnets. This design and operating principle eliminates multiple switchpoints. When using multiple magnetic field-sensitive BMF-sensors, these can be installed directly next to or behind one another.

Non-linearity Non-linearity specifies the maximum deviation of the characteristic from a straight reference line. This value applies to the linear range.

Operating principle

Output curves

Repeat accuracy R The repeat accuracy is the value of output signal changes under defined conditions, expressed as a percentage of the upper distance. In doing so, you have to measure in the lower, upper and middle areas of the linear range. It corresponds to the repeat accuracy R of proximity switches and is determined under the same standardized conditions (EN 60947-5-2). Displacement sensors with analog output achieve the value R of ≤ 5% defined in the standard.

Repeat accuracy RBWN Repeat accuracy describes the precision an analog sensor achieves when moving to a measuring point multiple times. The value specified on the basis of the Balluff Factory Standard (BWN Pr. 44) describes the maximum deviation from this measuring point.

Response time The response time is the time a sensor requires to reliably and steadily change the output signal. The specified time, which has been determined at the maximum measuring speed, includes both the electrical response time of the sensor and the time for the mechanical change of the damping state.

Slope The slope is a measure of the sensitivity of the sensor with respect to a distance change. This physical relationship can be calculated for travel sensors as follows:

BIL AMD0 BIL EMD0 BIL ED0

Slope S [V/mm] = Ua max –Ua min sa max –sa min

Slope S [mA/mm] = Ia max –Ia min sa max –sa min

or



Temperature coefficient TC The temperature coefficient describes the deviation of the sensor output signal under the influence of a temperature change, and thus also represents a quality criterion for the sensor.

Temperature drift The temperature drift is the shift a point experiences on the actual output curve at different temperatures. The temperature drift is described by the temperature coefficient.

Temperature load curve For series BMF 10E, for series BMF 305M...SA4 and BMF 21, BMF 32, BMF 305, BMF 315M...SA3, BMF 307, BMF 315. with increased temperature range (–25...+105 °C).

Tolerance T The tolerance is a variable that defines the manufacturing tolerance band of the output curve, thereby determining the maximum sample deviation.

Using in AC welding The magnetic cylinder sensors BMF 305M/315M/32M-..-W-.. can be operated in external fields up environments to a field strength of Emax = 200 kA/m. This limit is often exceeded in the direct vicinity of high current lines, e.g. welding equipment. The sensor should therefore be mounted at a distance dmin from such lines, as shown in the diagram below showing the relationship between current and conductor diameter.



Basic Information and DefinitionsCable stranding for cable out sensors

Conductors mm2 AWG # Strands x Dia. Jacket O.D.# # Strands x Dia. Jacket O.D.#

PVC Cable

PUR Cable

No. × Cross-Sectionof the Conductors

[mm²]

2 × 0.142 × 0.142 × 0.342 × 0.503 × 0.143 × 0.143 × 0.253 × 0.343 × 0.343 × 0.754 × 0.144 × 0.254 × 0.254 × 0.34

2 × 0.142 × 0.142 × 0.343 × 0.143 × 0.143 × 0.143 × 0.253 × 0.344 × 0.25

Type

LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LiY I8-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LifY-Y-11Y-0LiY I8-11Y-0

LifYY-0LifYY-0LifYY-0LifYY-0LifYY-0LifYY-0LifYY-0LifYY-0LifYY-0

Stranding

72 × 0.05 72 × 0.05 42 × 0.10 256 × 0.05 72 × 0.05 72 × 0.05 128 × 0.05 19 × 0.15 42 × 0.10 384 × 0.05 72 × 0.05 128 × 0.05 32 × 0.10 19 × 0.15

72 × 0.05 18 × 0.10 7 × 0.25 18 × 0.10 18 × 0.10 18 × 0.10 14 × 0.15 7 × 0.25 14 × 0.15

Cable Outside Diameter

3.9 ± 0.23.2 ± 0.24.9 ± 0.26.0 ± 0.23.5 ± 0.22.9 ± 0.24.5 ± 0.24.9 ± 0.24.9 ± 0.26.7 ± 0.23.7 ± 0.25.1 ± 0.25.1 ± 0.25.5 ± 0.2

3.0 ± 0.23.0 ± 0.24.9 ± 0.23.5 ± 0.22.9 ± 0.23.5 ± 0.24.5 ± 0.24.9 ± 0.25.1 ± 0.2

This table is a comparison of the PVC jacketed cable used for standard proximity sensors and Balluff PUR cable.

Comparison of PVC to PUR Cable - Cable Out Sensors

2

3

4

4

2

3

2

2

3

4

0.14

0.14

0.14

0.25

0.34

0.34

0.5

0.75

0.75

0.75

Number of

72 x 0.05 mm

18 x 0.1 mm

18 x 0.1 mm

14 x 0.15 mm

7 x 0.25 mm

7 x 0.25 mm

16 x 0.20 mm

24 x 0.20 mm

24 x 0.20 mm

24 x 0.20 mm

3.0 ± 0.2 mm

3.4 ± 0.3 mm

3.8 ± 0.3 mm

4.9 ± 0.3 mm

4.4 ± 0.3 mm

4.8 ± 0.3 mm

5.6 ± 0.2 mm

5.8 ± 0.2 mm

6.1 ± 0.2 mm

6.7 ± 0.2 mm

72 x 0.05 mm

72 x 0.05 mm

72 x 0.05 mm

128 x 0.05 mm

180 x 0.05 mm

180 x 0.05 mm

256 x 0.05 mm

384 x 0.05 mm

384 x 0.05 mm

384 x 0.05 mm

3.0 ± 0.2 mm

3.5 ± 0.2 mm

3.9 ± 0.2 mm

5.1 ± 0.2 mm

4.5 ± 0.2 mm

4.9 ± 0.2 mm

5.6 ± 0.2 mm

6.3 ± 0.2 mm

6.7 ± 0.2 mm

6.9 ± 0.2 mm

26

26

26

24

22

22

20

18

18

18

PVC Cable PUR CableSize



Basic Information and DefinitionsChemical resistance cable out sensors

Acetic Acid, Glacial 4 1 4Acetic Acid, 30% 4 1 4Acetone 4 2 4Acetylene 4 1 1Alkazene 4 — —

Aluminum Chloride (aq) 3 2 1Aluminum Nitrate (aq) 3 — —Ammonia Anhydrous 4 2 1Ammonia Gas (cold) 3 — —Ammonia Gas (hot) 4 — —

Ammonium Chloride 1 1 1Ammonium Sulfate (aq) 1 1 1Amyl Alcohol 4 2 1Amyl Napthalene 4 — —Animal Fats 1 — —

Aqua Regia 4 2 3Arsenic Acid 3 2 1Asphalt 2 1 1ASTM Fuel A 2 — —ASTM Fuel B 3 — —

ASTM Fuel C 3 1 1Barium Chloride (aq) 1 1 1Beer 2 1 1Beet Sugar Liquors 4 1 1Benzene 3 3 3

Benzine 2 — —Blast Furnace Gas 4 — —Bleach Solutions 4 — 1Borax 1 1 2Boric Acid 1 1 1

Brake Fluid 4 — —Brine 2 4 3Bromine Water 4 — —Bunker Oil 2 — —Butane 1 3 3

Butter 1 — —Butyl Alcohol 4 1 2Butylene 4 1 1Calcium Chloride (aq) 1 2 1Calcium Hydroxide (aq) 1 2 1

Calcium Nitrate (aq) 1 — —Calcium Sulfide (aq) 1 — —Cane Sugar Liquors 4 — 1Carbolic Acid 3 2 3Carbon Dioxide 1 3 1

Carbonic Acid 1 2 1Carbon Monoxide 1 2 1Carbon Tetrachloride 4 2 2Caster Oil 1 — 1Chlorine (dry) 4 2 1

Chlorine (wet) 4 — —Chloroform 4 3 4Chlorox 4 — —Chromic Acid 4 1 1Citric Acid 1 1 2

Coal Tar 3 — —Coconut Oil 2 — 1Cod Liver Oil 1 — 1Coke Oven Gas 4 — —Copper Chloride ·(aq) 1 2 1

Copper Cyanide (aq) 1 2 1Corn Oil 1 3 2Cotton Seed Oil 1 2 2Creosol 4 3 4Cyclohexane 1 2 4

Denatured Alcohol 4 — —Detergent Solution 4 1 1Diesel Oil 3 3 1Dioxane 4 — —Dowtherm Oil 3 — —

Dry Cleaning Fluids 4 — —Ethane 3 — 4Ethyl Acrylate 4 — —Ethyl Alcohol 4 — —Ethyl Benzine 4 — —

Ethyl Cellulose 2 — —Ethyl Chloride 2 — —

Ethyl Ether 3 — —Ethylene Chloride 4 3 4Ethylene Glycol 4 1 1Ethylene Oxide 4 3 3Ethylene Trichloride 4 — —

Ferric Chloride (aq) 1 1 1Ferric Nitrate (aq) 1 2 1Ferric Sulfate (aq) 1 1 1Fluorine (Liquid) 4 3 4Formaldehyde (RT) 4 2 1

Formic Acid 3 2 1Freon 11 4 3 1Freon 12 1 3 1Freon 22 4 — 2Fuel Oil 2 3 1

Furtural Glucose 4 1 1Glue 1 1 3Glycerin 1 1 1Glycois 4 — —Green Sulfate Liquor 1 — —

Hexane 2 3 2Hydraulic Oil 1 1 1Hydrochloric Acid (cold) 37% 4 2 2Hydrochloric Acid (hot) 37% 4 — —Hydrofluoric Acid (Conc.) Cold 3 — — Hydrofluoric Acid (conc.) Hot 4 — —Hydrogen Gas 1 1 1

Isobutyl Alcohol 4 — —Isooctane 2 — —Isopropyl Acetate 4 2 4Isopropyl Alcohol 3 — —Isopropyl Ether 2 1 2

Kerosene 1 3 4Lacquers 4 2 3Lacquer Solvents 4 2 3Lard 1 2 1Lavender Oil 4 — —

Lead Acetate (aq) 4 1 1Linseed Oil 2 3 1Lubricating Oils 2 4 2Lye 4 — —Magnesium Chloride (aq) 1 1 1

Magnesium Hydroxide (aq) 4 1 1Mercury 1 1 2Methane 3 — —Methyl Acetate 4 2 4Methyl Acrylate 4 — —

Methyl Alcohol 4 1 1Methyl Butyl Ketone 4 — 1Methyl Chloride 4 3 4Methylene Chloride 4 3 4Methyl Ethyl Ketone 4 2 4

Methyl Isobutyl Ketone 4 — —Milk 4 1 1Mineral Oil 1 2 1Naphtha 2 1 3Naphthaline 2 1 4

Natural Gas 2 — —Neatsfoot Oil 1 — —Nitric Acid (Conc.) 4 3 4Nitric Acid (Delute) 3 — 4Nitroethane 4 — —

Nitrogen 1 — —N-Octane 4 — —Oleic Acid 2 3 3Oleum Spirits 3 4 4Olive Oil 1 1 3

Oxygen-Cold 1 — —Oxygen (200-400°F) 4 — —Paint Thinner 4 — —Perchloric Acid 4 — —Perchloroethylene 4 4 3

Petroleum-Below 250°F 2 — —Petroleum-above 250°F 4 — —

The following ratings are general guidelines, designed only to be used as an initial screening tool. Keep in mind that dynamic vs. static application, temperature, and chemical mixtures can significantly affect or change these ratings either positively or negatively. Careful testing under actual conditions is essential. Accuracy for these ratings is not given or implied.

P/E

PUR

PVC

RATINGS: 1 = little or no effect 2 = minor effect 3 = moderate effect 4 = severe effect

PUR = PolyurethaneP/E = PolyethylenePVC = Polyvinyichloride (vinyl)

PUR

P/E

PVC

Cable Type Sensor Jackets

Phenol 3 2 3Phenyl Ethyl Ether 4 — —Phosphoric Acid-45% 1 2 2Picking Solution 4 — —Picric Acid 2 — 4

Potassium Acetate (aq) 4 — —Potassium Chloride (aq) 1 1 1Potassium Cyanide (aq) 1 1 1Potassium Hydroxide (aq) 4 1 1Producer Gas 1 1 1

Propane 3 3 1Propyl Alcohol 4 — —Propylene 4 — —Propylene Oxide 4 — —Pydraul, 10E, 29 ELT 4 — —

Pydraul, 30E, 50E, 65E 4 — —Pydraul, 115E 4 — —Pydraul, 230E, 312C, 540C 4 — —Rapeseed Oil 2 — —Red Oi l(MIL-H-5606) 1 — —

RJ-1 (MIL-F-23338 B) 1 — —RP-1 (MIL-F-25576 C) 1 — —Salt Water 2 1 1Sewage 4 — —Silicate Esters 1 — —

Silicone Oils 1 1 1Silver Nitrate 1 2 1Skydrol 500 4 — —Skydrol 700 4 — —Soap Solutions 3 3 1

Sodium Chloride (aq) 1 1 1Sodium Hydroxide (aq) 4 2 1Sodium Peroxide (aq) 4 1 2Sodium Phosphate (aq) 1 — —Sodium Sulfate (aq) 1 1 1

Soy Bean Oil 2 1 1Steam Under 300°F 4 — —Steam Over 300°F 4 — —Stoddard Solvent 1 3 3Styrene 3 — 4

Sucrose Solution 4 — —Sulfuric Acid (Dilute) 3 1 1Sulfuric Acid (Conc.) 4 3 4Sulfuric Acid (20% Oleum) 4 — —Sulfurous Acid 3 2 1

Tannic Acid 1 2 1Tetrochloroethylene 4 2 4Toluene 4 3 4Transformer Oil 1 — —Transmission Fluid Type A 1 — —

Trichloroethane 4 — 3Trichloroethylene 4 3 4Turbine Oil 1 3 1Turpentine 4 3 2Varnish 3 3 4

Vinegar 4 2 1Vinyl Chloride 4 — —Water 1 1 1Whiskey, Wines 2 3 1White Oil 1 — —

Wood Oil 3 — —Xylene 4 3 4Zinc Acetate (aq) 4 — —Zinc Chloride (aq) 1 1 1

PUR

P/E

PVC


Basic Information and DefinitionsTPE cables

- Oil Resistant- 10 million+ rolling C-track Flex Cycles - 10 million Tick/Tock Test Cycles- Temperature Rating: 105°C to -24°C- Flame Retardant- Sunlight Resistant- Weld Flash Resistant- Bend Radius = 10 x O.D.

30% Sulfuric Acid

10% Nitric Acid

Glacial Acidic Acid

Carbon Tetrachloride

10% Sodium Hydroxide

10% Ammonium Hydroxide

20% HCL

Chemical PVC PURTPE Neoprene

R

R

S

NR

R

R

R

R

R

NR

NR

R

R

R

R

R

R

NR

S

S

R

R

R

-

-

S

S

-

Resistance to Acids & Bases

General Properties of TPE Jacketed Cable

3 wire O.D. = 5.1 mm 4 wire O.D. = 5.3 mm

R = Recommended - Unaffected by chemicalS = Satisfactory - Very little effectL = Limited use - Chemical attack probable with slow deteriorationNR = NOT recommended - Severe attack is imminent

Mobil Oil DTE 26

Mobil Oil DTE 24

Castor Oil

Simeol

Trimsol

ASTM Oil 1, 2 or 3

Transformer Oil

Diesel Fuel

Gasoline

Kerosine

R

R

R

R

R

R

S

S

S

R

-

-

-

-

-

S

S

NR

NR

R

-

-

R

-

-

-

R

L

S

L

-

-

-

-

-

S

R

S

S

S

KEY:

Chemical PVC PURTPE Neoprene

Resistance to Oils & Fuels Basic informationInductive sensorsPhotoelectric sensorsCapacitive sensorsMagnetic cylinder sensorsCablesMaterialsIEC StandardsQuality/ StandardsConversion Tables



OxidationHeatOilLow Temperature FlexibilityWeather, SunOzoneAbrasionElectrical PropertiesFlameNuclear RadiationWaterAcidAlkaliGasolineBenzolDegreaser SolventsAlcoholWeld Slag

Resistance to: PURPVC TPE

Relative Cable Performance

Control Water

WS3-908D 10%

WS3-933B 10%

WY4-876A 10%

SYNTILO 9904 10%

SUPEREDGE 6768 10%

WS3-908D conc

WS3-933B conc

WY4-876A conc

SYNTILO 9904 conc

SUPEREDGE 6768 conc

1.392

3.671

7.028

2.518

1.547

5.872

0.688

3.392

-0.839

-0.489

2.737

1.671

7.331

11.499

8.702

1.918

12.576

5.491

10.763

-0.289

0.145

8.475

Castrol Oils PURTPE

Note: In every coolant environment that has been field tested, TPE has performed as good or better than PUR.

This testing was done by removing a piece of jack-et material from the test cables and placing them in a bath of various Castrol coolants for 6 weeks. The solutions were kept at a constant temperature of 120°F (based on a standard operating tempera-ture for machine coolants of 80-90°F). The mass of the samples were measured before the testing and at 1 week intervals during the testing. These values are a 6 week average mass percentage increase or decrease.

Castrol Coolant Testing

EG - E

FP - GG - E

EF - GF - G

EF

G - EG - EG - E

PP - FP - FG - E

F

EEOEEEEEEE

G - EEEEEEEE

OOOOOEEEOPEEEEEEEE

KEY:P = PoorF = FairG = GoodE = ExcellentO = Outstanding

Note: These relative ratings are based on average performance. Special selective compounding of the jacket can improve the performance.



Removal clearance

For permissible tightening torque, see data sheets or sensor packaging.

The removal clearance refers to the necessary clearance which must be allowed for when removing the connector without difficulty. It results from the connector height “y” plus a space “s”, which is determined mainly by the spatial conditions.

Tightening torques

Housing tolerances for unthreaded tubular sensors

Diameter tolerance∅ 3 mm ± 0.1∅ 4 mm ± 0.1∅ 6.5 mm ± 0.15∅ 8 mm ± 0.15

Radius(R)

(D) Diameter

R = 3 x D

CABLE CLAMP

SUPPORT

Mounting Suggestions for Cable-out Sensors

To obtain the maximum cable life from a cable-out sensor, the following mounting guidelines should be followed. These guidelines apply to both types of cable jackets supplied: Polyvinyl-chloride (PVC) and Polyurethane (PUR). The bend radius values shown apply to all cable-out sensors and all pigtail (cable with moulded connector) sensors with potted in cables.

Tension (fixed) Installation

The minimum bend radius should be 3 times the cable diameter.

Non-tensioned Installation

The minimum bend radius should be 4 times the cable diameter.

NOTE: Even when the minimum bend radius is observed, unintentional stress can be placed on the rear of the sensor body at the cable exit. Proper cable loops should be maintained to prevent unnecessary stress to this area. Basic

informationInductive sensorsPhotoelectric sensorsCapacitive sensorsMagnetic cylinder sensorsCablesMaterialsIEC StandardsQuality/ StandardsConversion Tables


Basic Information and DefinitionsMaterials

Metals

Plastics

Materials

AlAluminum wrought alloy

CuZnBrass

Stainless steel

GD-AlCast aluminum

GD-ZnCast zinc

ABSAcrylonitrile Butadiene Styrene

AES/CPAcrylonitrile-Ethylene-propyl-ene-Styrene

EPEpoxy resin

LCPLiquid Crystalline Polymer

PA 6, PA 66, PA mod., PA 12Polyamide

PA transp.Transparent polyamide

PBT, PBTPPolybuteneterephthalate

Standard aluminum for cut shaping. Can be anodized. Used for housings and fastening parts.

Transparent, hard, inflexible. Good chemical resistance.

Use and characteristics

Standard housing material. Nickel plated for surface protection.

Excellent corrosion resistance and strength.Quality 1.4034, 1.4104: (430F)Standard material.Quality 1.4305 (303), 1.4301: (304) Standard material for food grade applications.Quality 1.4401 (316),1.4404,1.4571: (316T)For food grade applications with heightened requirements for chemical resistance

Low specific gravity. Good strength and wear resistance. Some types can be anodized.

Good wear and strength. Usually with protective surface coating.

Impact resistant, inflexible, limited chemical resistance. Used for housings.

Duromer, molding resin, highest mechanical strength and tempera-ture resistance. Very good dimensional stability.Non-melting.

High mechanical strength and temperature resistance. Very good chemical resistance. Inherently non-flammable.

Good mechanical strength. Temperature resistance. PA 12 approved for food industry applications.

High mechanical strength and temperature resistance. Some types flame-retardant. Good chemical resistance. Good oil resistance.

Impact-resistant, stiff, flame retarding, self-extinguishing


Basic Information and DefinitionsMaterials

Materials PCPolycarbonate

PEEKPolyetheretherketone

PEIPolyetherimide

PMMAPolymethylmethacrylate

POMPolyoxymethylene

PPPolypropylene

PPEPolyphenylenether

PTFEPolytetraflourethylene

PURPolyurethane

PVCPolyvinylchloride

PVDFPolyvinylidenfluoride

TPEThermoplastic elastomer

Glass

Ceramic

Use and characteristics

High mechanical strength and good temperature resistance. Good chemical resistance against many solvents. Transpar-ent with amber-yellow inherent color (not pigmented).

Clear, transparent, hard, scratch-resistance, UV resistant, mainly for optical applications.

High impact resistance, good mechanical strength. Good chemical resistance.

Tough, inflexible, high mechanical strength over a wide tem-perature range. Good chemical resistance. Good hot water resistance.

Very good temperature and chemical resistance.

Elastic, abrasion-resistant, impact-resistant. Good resis-tance to oils, greases, solvents (used for gaskets and cable jackets).

Good mechanical strength and chemical resistance (used for cable).

Thermoplastic. High temperature resistance and mechanical strength. Good chemical resistance (similar to PTFE).

Good chemical resistance and strength. Used primarily in optical applications (lenses, covering panes).

Very good strength and chemical resistance. Electrically insulating. Excellent temperature resistance.

Very good electrical properties. Impact resistant, tough, mechanically resilient. Very low water absorption. Good to very good chemical resistance.

Thermoplastic. Very high strength and temperature resis-tance. Good chemical resistance. Can be sterilized, good resistance to ionizing radiation.

Clear, hard, elastic and impact resistant. Good temperature resistance. Limited chemical resistance.

A Thermoplastic compound which combines the best properties of PVC and rubber insulation. Resistant to oils, chemicals, acids, solvents and weld slag.

Plastics

Other



Basic Information and DefinitionsIEC enclosure standards

The IEC publication 529 and DIN Standard number 40050 both address the classification of degrees of protec-tion provided by enclosures. The following is a brief overview of the coding system described in these standards.

General The degrees of protection are indicated by a symbol consisting of the two code letters IP, always the same, (International Protection) and two reference numbers indicating the degree of protection.

Example 44IP

Code letters

First reference number (see table)

Second reference number

This standard does not specify degree of protection of electrical against mechanical damage, against the risk of explosion or against conditions such as moisture (produced for example by condensation), corrosive vapors, fungus or vermin.

Note:

0 = no special protection. *no test

1 = protected against a rigid sphere of 50mm ø * A rigid 50 mm sphere must not pass through an opening with an applied force of 50 N.

2 = protected against solid objects greater than 12.5mm ø. * A rigid 12 mm sphere must not pass through an opening with an applied force of 30 N.

3 = protected against solid objects greater than 2.5mm. * A straight rigid steel wire 2.5 mm in dia. must not enter the equipment with an applied force of 3 N.

4 = protected against solid objects greater than 1mm. * A straight rigid steel wire 1 mm in dia. must not enter the equipment with an applied force of 1 N.

5 = dust protected * A straight rigid steel wire 1 mm in dia. must not enter the equipment with an applied force of 1 N. Also, dust chamber test to DIN 40 052.

6 = dust-tight and complete protectionagainst contact. * A straight rigid steel wire 1 mm in dia. must not enter the equipment with an applied force of 1 N. Also, dust chamber test to DIN 40 052.

First Number**Test and assessment in italic

Second Number*Test and assessment in italic

0 = no special protection *no test

1 = protected vertical falling water * Dripping device or sprinkler nozzle in accordance with DIN 40 053 part 1 or part 5 respectively.

2 = protected against vertical falling water drops when enclosure tilted at 15° * Dripping device or sprinkler nozzle in accordance with DIN 40 053 part 1 or part 5 respectively.

3 = protected against splashing water at an angle up to 60° * Oscillating tube or spray nozzle in accordance with DIN 40 053 part 2 or part 3 respectively depending on the shape and size of sample.

4 = protected against splashing water from any direction * Oscillating tube or spray nozzle in accordance with DIN 40 053 part 2 or part 3 respectively depending on the shape and size of the sample. 5 = protected against water jets * Jet nozzle of nominal size 6 in accordance with DIN 40 053 part 4.

6 = protected against powerful water jets * Jet nozzle of nominal size 12 in accordance with DIN 40 053 part 4.

7 = protected from the effects of temporary immersion. * Enclosure is completely immersed in water and the following conditions must be met: a) water must be at least 150 mm over the highest point of the enclosure b) lowest part of the enclosure must be at least 1 m below the surface c) test must last for at least 30 minutes d) water temperature must not deviate by more than 5°C; Water must not enter in harmful quantities.

8 = protected from the effects of continuous immersion * Test conditions have to be agreed to by the manufacturer and the customer but can not be less stringent than those described in 7 above.

9K = protected from the effects of high pressure steam cleaning per DIN 40050 part 9


Basic Information and DefinitionsQuality

Quality and the environment

Quality management system as per DIN EN ISO 9001:2008

Environmental management system as per DIN EN ISO 14001:2009

Testing laboratory

Balluff products comply with EU directives

Product approvals

Balluff companiesBalluff GmbH GermanyBalluff SIE Sensorik GmbH GermanyBalluff Controles Elétricos Ltda. Brazil Balluff Sensors (Chengdu) Co., Ltd. ChinaBalluff Ltd. Great BritainBalluff Automation S.R.L. ItalyBalluff Canada Inc. CanadaBalluff de México S.A. de C.V. MexicoBalluff GmbH AustriaBalluff Sp. z o.o. PolandBalluff Hy-Tech AG SwitzerlandBalluff Sensortechnik AG SwitzerlandBalluff S.L. SpainBalluff CZ, s.r.o Czech RepublicBalluff Elektronika Kft. HungaryBalluff Inc. USA

Product approvals are awarded by domestic and international institu-tions. Their symbols affirm that our products meet the specifications of these institutions.

"US Safety System" and "Canadian Standards Association" under the auspices of Underwriters Laboratories Inc. (cUL).

CCC-Code by the Chinese CQC.

Products that require labeling are subject to a conformity evaluation process according to the EU directive and the product is labeled with the CE marking. Balluff products fall under the following EU directive:

Balluff companiesBalluff GmbH GermanyBalluff Sensors (Chengdu) Co., Ltd. ChinaBalluff Elektronika KFT Hungary

2004/108/EC EMC directive2006/95/EC Low Voltage Directive valid for

products with supply voltage ≥ 75 V DC/≥ 50 V AC

94/9/EC ATEX-directive valid for products with Ex-label

The Balluff testing laboratory operates in accordance with ISO/IEC 17025 and is accredited by DAkks for testing electromagnetic compatibility (EMC).



Basic Information and DefinitionsStandards

Degree of protection (enclosure rating)

IP 60...67

IP 68 per BWN Pr. 20

IP 68 per BWN Pr. 27

IP 69K

EN 60529/IEC 60529

Balluff Factory Standard (BWN): Temperature storage 48 h at 60 °C, 8 temperature cycles per EN 60068-2-14/IEC 60068-2-14 between the reference temperatures as per data sheet, 1 h under water,

Balluff Factory Standard (BWN): Product testing for DIN 40050 Part 9

24 h under water, isolation testing,8 temperature cycles per EN 60068-2-14/IEC 60068-2-14 between the reference temperatures as per data sheet, 7 days under water, insulation test.

Testing of products for use in the food industry.

Protection against infiltration of water under high pressure and steam cleaning.


FMS: Factory Mutual System. Factory Mutual Research Corp. (FMRC) researches, tests and creates stan-dards designed to prevent property loss through fire or other hazards. The FMS logo and the “APPROVED” approbation indicate that the manufac-turer’s product meets the current FM requirements for this product class. J.I. OR1HO.AX andJ.I. 4V9A4.AX.

II EN 60947-5-2/IEC 60947-5-2

Low-voltage equipment EN 60947-5-2/IEC 60947-5-2

NAMUR sensors EN 60947-5-6/IEC 60947-5-6

Basic Information and DefinitionsStandards

EN 55011

EN 61000-4-2/IEC 61000-4-2

EN 61000-4-3/IEC 61000-4-3

EN 61000-4-4/IEC 61000-4-4

EN 61000-4-6/IEC 61000-4-6

EN 61000-4-11/IEC 61000-4-11

EN 60947-5-2/IEC 60947-5-2

EN 60068-2-6/IEC 60068-2-6

EN 60068-2-27/IEC 60068-2-27

EN 60068-2-29/IEC 60068-2-29

EN 50014

EN 60079-0

EN 50020

Emissions, RF noise voltage and RF noise radiation from electrical equipment

Static discharge immunity (ESD)

Radio frequency immunity (RFI)

Immunity to fast transients (burst)

Immunity to line-carried noise induced by high-frequency fields

Immunityto voltage dips and voltage interruptions

Surge-voltage stability

Vibration, sinusoidal:

Shock

Continuous shock

Electrical equipment for explosive atmospheres, general requirements.Succeeded by:Electrical equipment for gas explosive atmospheres, general requirements.

Electrical equipment for explosive atmospheres, intrinsically-safe “i”.

For conformity, see product marking.

EMC(ElectromagneticCompatibility)

Environmental simulation

Ex-zone

FMS approval for select sensors and sensing amplifiers

Insulation class

Sensors



Basic Information and DefinitionsTable of inch fractions & decimals to millimeters

1 1/32 1.0312 26.1941 1/16 1.062 26.988— 1.063 271 3/32 1.094 27.781— 1.1024 28

1 1/8 1.125 28.575— 1.1417 291 5/32 1.156 29.369 — 1.1811 301 3/16 1.1875 30.163

1 7/32 1.219 30.956— 1.2205 311 1/4 1.250 31.750— 1.2598 321 9/32 1.281 32.544

— 1.2992 331 5/16 1.312 33.338— 1.3386 341 11/32 1.344 34.1311 3/8 1.375 34.925

— 1.3779 351 13/32 1.406 35.719— 1.4173 361 7/16 1.438 36.513— 1.4567 37

1 15/32 1.469 37.306— 1.4961 381 1/2 1.500 38.1001 17/32 1.531 38.894— 1.5354 39

1 9/16 1.562 39.688— 1.5748 401 19/32 1.594 40.481— 1.6142 411 5/8 1.625 41.275

— 1.6535 421 21/32 1.6562 42.0691 11/16 1.6875 42.863— 1.6929 431 23/32 1.719 43.656

— 1.7323 441 3/4 1.750 44.450— 1.7717 451 25/32 1.781 45.244— 1.8110 46

1 13/16 1.8125 46.0381 27/32 1.844 46.831— 1.8504 471 7/8 1.875 47.625— 1.8898 48

1 29/32 1.9062 48.419— 1.9291 491 15/16 1.9375 49.213— 1.9685 50

— .0004 .01— .004 .10— .01 .251/64 .0156 .397— .0197 .50

— .0295 .751/32 .03125 .794— .0394 13/64 .0469 1.191— .059 1.5

1/16 .0625 1.5885/64 .0781 1.984— .0787 23/32 .094 2.381— .0984 2.5

7/64 .1093 2.776— .1181 31/8 .1250 3.175— .1378 3.59/64 .1406 3.572

5/32 .15625 3.969— .1575 411/64 .17187 4.366— .177 4.53/16 .1875 4.763

— .1969 513/64 .2031 5.159— .2165 5.57/32 .21875 5.55615/64 .23437 5.953

— .2362 61/4 .2500 6.350— .2559 6.517/64 .2656 6.747— .2756 7

9/32 .28125 7.144— .2953 7.519/64 .29687 7.5415/16 .3125 7.938— .3150 8

21/64 .3281 8.334— .335 8.511/32 .34375 8.731— .3543 923/64 .35937 9.128

— .374 9.53/8 .3750 9.52525/64 .3906 9.922— .3937 1013/32 .4062 10.319

— .413 10.527/64 .42187 10.716— .4331 117/16 .4375 11.113

Fractions Decimals mm



29/64 .4531 11.50915/32 .46875 11.906— .4724 1231/64 .48437 12.303— .492 12.5

1/2 .500 12.700— .5118 1333/64 .5156 13.09717/32 .53125 13.49435/64 .54687 13.891

— .5512 149/16 .5625 14.288— .571 14.537/64 .57812 14.684— .5906 15

19/32 .59375 15.08139/64 .60937 15.4785/8 .6250 15.875— .6299 1641/64 .6406 16.272

— .6496 16.521/32 .65625 16.669— .6693 1743/64 .67187 17.06611/16 .6875 17.463

45/64 .7031 17.859— .7087 1823/32 .71875 18.256— .7283 18.547/64 .73437 18.653

— .7480 193/4 .7500 19.05049/64 .7656 19.44725/32 .78125 19.844— .7874 20

51/64 .79687 20.24113/16 .8125 20.638— .8268 2153/64 .8281 21.03427/32 .84375 21.431

55/64 .85937 21.828— .8662 227/8 .8750 22.22557/64 .8906 22.622— .9055 23

29/32 .90625 23.01959/64 .92187 23.41615/16 .9375 23.813— .9449 2461/64 .9531 24.209

31/32 .96875 24.606— .9843 251 1.000 25.4— 1.0236 26

Inches Inches Inches



Inches

Basic Information and DefinitionsTable of inch fractions & decimals to millimeters


— 5.9055 1506 6.000 152.4006 1/4 6.250 158.750— 6.2992 1606 1/2 6.500 165.100

— 6.6929 1706 3/4 6.750 171.4507 7.000 177.800— 7.0866 180— 7.4803 190

7 1/2 7.500 190.500— 7.8740 2008 8.000 203.200— 8.2677 2108 1/2 8.500 215.900

— 8.6614 2209 9.000 228.600— 9.0551 230— 9.4488 2409 1/2 9.500 241.300

— 9.8425 25010 10.000 254.000— 10.2362 260— 10.6299 27011 11.000 279.400

— 11.0236 280— 11.4173 290— 11.8110 30012 12.000 304.80013 13.000 330.200

— 13.7795 35014 14.000 355.60015 15.000 381— 15.7480 40016 16.000 406.400

17 17.000 431.800— 17.7165 45018 18.000 457.20019 19.000 482.600— 19.6850 500

20 20.000 50821 21.000 533.40022 22.000 558.80023 23.000 584.20024 24.000 609.600

25 25.000 635.00026 26.000 660.40027 27.000 685.80028 28.000 711.20029 29.000 736.600

30 30.000 762.00031 31.000 787.40032 32.000 812.80033 33.000 838.200


— 3.2677 83— 3.3071 843 5/16 3.312 84.1377— 3.3464 853 3/8 3.375 85.725

— 3.3858 86— 3.4252 873 7/16 3.438 87.313— 3.4646 883 1/2 3.500 88.900

— 3.5039 89— 3.5433 903 9/16 3.562 90.4877— 3.5827 91— 3.622 92

3 5/8 3.625 92.075— 3.6614 933 11/16 3.6875 93.663— 3.7008 94— 3.7401 95

3 3/4 3.750 95.250— 3.7795 963 13/16 3.8125 96.838— 3.8189 97— 3.8583 98

3 7/8 3.875 98.425— 3.8976 99— 3.9370 1003 15/16 3.9375 100.013— 3.9764 101

4 4.000 101.6004 1/16 4.062 103.1884 1/8 4.125 104.775— 4.1338 1054 3/16 4.1875 106.363

4 1/4 4.250 107.9504 5/16 4.312 109.538— 4.3307 1104 3/8 4.375 111.1254 7/16 4.438 112.713

4 1/2 4.500 114.300— 4.5275 1154 9/16 4.562 115.8884 5/8 4.625 117.475— 4.7244 120

4 3/4 4.750 120.6504 7/8 4.875 123.825— 4.9212 1255 5.000 127— 5.1181 130

5 1/4 5.250 133.3505 1/2 5.500 139.700— 5.5118 1405 3/4 5.750 146.050

1 31/32 1.969 50.0062 2.000 50.800— 2.0079 51— 2.0472 522 1/16 2.062 52.388

— 2.0866 532 1/8 2.125 53.975— 2.126 54— 2.165 552 3/16 2.1875 55.563

— 2.2047 56— 2.244 572 1/4 2.250 57.150— 2.2835 582 5/16 2.312 58.738

— 2.3228 59— 2.3622 602 3/8 2.375 60.325— 2.4016 612 7/16 2.438 61.913

— 2.4409 62— 2.4803 632 1/2 2.500 63.500— 2.5197 64— 2.559 65

2 9/16 2.562 65.088— 2.5984 662 5/8 2.625 66.675— 2.638 67— 2.6772 68

2 11/16 2.6875 68.263— 2.7165 692 3/4 2.750 69.850— 2.7559 70— 2.7953 71

2 13/16 2.8125 71.438— 2.8346 72— 2.8740 732 7/8 2.875 73.025— 2.9134 74

2 15/16 2.9375 74.613— 2.9527 75— 2.9921 763 3.000 76.200— 3.0315 77

3 1/16 3.062 77.788– 3.0709 78— 3.1102 793 1/8 3.125 79.375— 3.1496 80

3 3/16 3.1875 80.963— 3.1890 81— 3.2283 823 1/4 3.250 82.550

Inches Inches Inches




Basic Information and DefinitionsUS measures to metric conversion tables

Length Inches (“) to Millimeters (mm) mm = in x 25.4

Microinches (µ”) to Micrometers (µm)

Inches mm Inches mm Inches mm Inches mm

10 254.0 11 279.4 12 304.8 13 330.2 14 355.6 15 381.0 16 406.4 17 431.8 18 457.2 19 482.6 20 508.0 21 533.4

22 558.8 23 584.2 24 609.6 25 635.0 26 660.4 27 685.8 28 711.2 29 736.6 30 762.0 40 1016.0 50 1270.0

0.001 0.0254 0.005 0.127 0.010 0.254 0.015 0.381 0.020 0.508 0.030 0.762 0.040 1.016 0.050 1.270 0.060 1.524 0.070 1.778 0.080 2.032 0.090 2.286

1/8 3.175 1/4 6.350 1/2 12.700 3/4 19.050 1 25.4 2 50.8 3 76.2 4 101.6 5 127.0 6 152.4 7 177.8 8 203.2 9 228.6

µ” µm µ” µm µ” µm µ” µm

1 0.0254 2 0.0508 3 0.0762 4 0.1016

5 0.127 10 0.254 20 0.508 30 0.762

40 1.016 50 1.270 100 2.540 200 5.080

300 7.62 400 10.16 500 12.70 1000 25.40

PressurePounds per Square Inch (psi) to Kilopascal (kPa) and bar 1 psi = 0.0691 bar 1 bar = 14.47 psi

psi kPa bar psi kPa bar psi kPa bar psi kPa bar

1 6.90 0.0691 2 13.79 0.138 3 20.69 0.207 4 27.58 0.276

300 2068.50 20.685 400 2758.00 27.580 500 3447.50 34.475 1000 6895.00 68.950

TemperatureFahrenheit (°F) to Celcius (°C) °C = 5/9 (°F - 32) (Values for °C are rounded off)

F° C°

-40 -40 -30 -34 -20 -29 -10 -23 0 -18 10 -12 20 -7

30 -1 40 4 50 10 60 16 70 21 80 27 90 32

100 38 110 43 120 49 130 54 140 60 150 66 160 71

170 77 180 82 190 88 200 93 210 99 220 104 230 110

F° C° F° C° F° C°

5 34.48 0.34610 68.95 0.69020 137.90 1.3793 0 206.85 2.069

40 275.80 2.758 50 344.80 3.448100 689.50 6.895200 1378.95 13.790


Basic Information and DefinitionsMetric to US measures conversion tables

Length

Micrometers (µm) to Microinches (µ”)

0.5 19.691 39.372 78.743 118.0

4 157.55 196.96 236.27 275.6

8 315.09 354.310 39420 78730 1181

40 157550 1969100 3937

µ m µ”

0.1 3.9370.2 7.8740.3 11.8110.4 15.75

µ m µ” µ m µ” µ m µ” µ m µ”

mm Inches mm Inches mm Inches mm Inches mm Inches

1 0.039 2 0.079 3 0.118 4 0.157 5 0.197

6 0.236 7 0.276 8 0.315 9 0.354 10 0.394

200 7.874 300 11.811 400 15.748 500 19.685 1000 39.37

20 0.787 30 1.181 40 1.575 50 1.969 100 3.937

0.1000 0.004 0.2000 0.008 0.3000 0.012 0.400 0.016 0.500 0.020

Millimeters (mm) to Inches (“) in = mm x 0.03937

PressureKilopascal (kPa) to Pounds per Square Inch (psi)

kPa psi kPa psi kPa psi kPa psi kPa psi

1 0.145 2 0.290 3 0.435 4 0.580 5 0.725

10 1.45 20 2.90 30 4.35 40 5.80

50 7.25 100 14.50 200 29.0 300 43.5

400 58.0 500 72.5 1000 145.0 2000 290

3000 435 4000 580 5000 725 10000 1450

85 185 90 194 95 203 100 212

TemperatureCelsius (°C) to Fahrenheit (°F) °F = 9/5 (°C) + 32°

-15 5 -10 14 -5 23 0 32

5 41 10 50 15 59 20 68

25 77 30 86 35 95 40 104

45 113 50 122 55 131 60 140

65 149 70 158 75 167 80 176

C° F° C° F° C° F° C° F° C° F° C° F°


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