hach540 br reprintv4 - mag srlmagsrl.com.ar/imagenes/hach/electroquimicos/4360se... · sension1...

Family of Electrochemical Products

a c l a s s o f m e t e r s a n d e l e c t r o d e s b u i l t t o l a s t .

TM

2

Table of Contentssension™ Meters (manufactured exclusively by Hach)

Benefits of sension Technology ...................................................................3

sension1 Basic Portable pH Meter .......................................................6

sension2 Advanced Portable pH/ISE Meter ................................7

sension3 Basic Benchtop pH Meter....................................................8

sension4 Advanced Benchtop pH/ISE Meter.............................9

sension5 Portable Conductivity Meter..........................................10

sension6 Portable Dissolved Oxygen Meter .............................11

sension7 Benchtop Conductivity Meter......................................12

sension8 Benchtop Dissolved Oxygen Meter.........................13

sension156 Portable Multi-parameter Meter ......................14

sension378 Benchtop Multi-parameter Meter...................16

Comparative Meter Specification Chart..............................................18

sension™ Electrodes

New Platinum Series Electrode Technology ..................................22

pH Electrodes.................................................................................................................24

pH Buffers and Solutions..................................................................................26

Article: The Sometimes Maddening Science of pH Measurement by Richard Presley......................................................28

Ion-Selective Electrodes (ISE)........................................................................30

Reference Electrodes ..............................................................................................32

Temperature Probe...................................................................................................32

Accessories........................................................................................................................34

Outstanding Technical SupportWith the sension line of meters and electrodes, we expectfewer technical support calls than ever. But isn’t it nice toknow that a team of experts is standing by to help you answerquestions about pH and ISE testing? These helpful support specialists take hundreds of calls each week on questions as basicas “What is pH?” to “Which electrochemical probe do I need?”Let us field your sension questions today!

Unprecedented GuaranteesWe’re so confident about the quality of the Hach-manufacturedsension Meters that we’ve issued a generous three-year warranty.Hach also offers a one-year warranty on electrodes.

How to Contact Hach

Domestic Calls: 800-227-4224 or Fax 970-669-2932International Calls:970-669-3050 or Fax 970-461-3939

HACH COMPANY P.O. Box 389 Loveland, Colorado 80539-0389U.S.A.E-mail: [email protected] or [email protected]

3

M o r e p r e c i s e a n d i n t u i t i v e t h a n e v e r b e f o r e

Introduction

Hach is back in the e-chem manufacturing business – with a family of ultra-reliable, precision-engineered portable, laboratoryand multi-parameter meters, and a robust new electrode line.

Contemporary, rugged, and absolutely guaranteed to meetyour expectations for performance and reliability, Hach’s sensionelectrochemical products offer significant technologicalimprovements, highly intuitive software, and an abundance oftime-saving features designed to simplify and perfect pH, ISE,conductivity, and dissolved oxygen testing.

Best of all, sension products are backed by the best technicalsupport in the industry, and by generous product warranties.You can be confident in the performance of these products.

Meters with built-in confidence

• Three-year warranty

• RS-232 downloading capability (in all models except the sension1)

• Tough construction, tight circuit integrity

• 100% waterproof (IP67) and floatable

• Substantive “feel” — easy to hold and use

• Ultra-responsive to electrode input

• Intuitive interface with minimal keystrokes and touch-key commands

• Very easy to calibrate and use

• Built-in electrode holder

• Revolutionary docking station (sension 2,5,6 and 156)

Electrodes built to last

• Exceptional precision and accuracy

• Quicker response with improved glass formulation

• Fast, accurate readings due to design of thermistor and bulb

• Smooth, consistent dispenser action

• Simpler single-junction reference (Hach patented)

• Non-clogging

• 12-month warranty

Hach’s sensionTM

Family of Electrochemical Products

Manuals for every model!In response to customer demand, all sensionmeters and electrodes come with complete procedures incorporating Hach’s signature icons andhelpful tips for simplified, easy-to-follow testing.

Meet our sensionTMMeters(You’ll love how they work.)

Additional features you’ll appreciate:

• Displays status indicators and data in large, readable digits

• Automatically recognizes 4.01, 6.86, 7.00, and 10.01 pH buffers

• Responds quickly and displays resolution to 0.1, 0.01 and 0.001

• Uses real-time clock to time and date stamp data in 99-point memory (199-point memory in some models)

• Recalls readings at the push of a button

• Downloads data to computer or printer

• Measures and compensates temperature in ºC or ºF

• Features electrode holder complete with a vinyl cover tokeep electrode hydrated when not in use

• Automatically calculates antilogs to compute true pH averages (This feature available on sension2, sension3, and sension4.)

• Carries the European CE mark

A completely integrated analysis packageLike all Hach instruments, sension meters are designed for maximum simplicity, high value, and precision results. Each meter is a complete analysis package, supplied with:

• a robust new electrode, buffers and beakers

• easy-to-follow, illustrated procedures

• personalized service and technical support

Revolutionary docking station.Activate your portable meter’s downloading capability aseasily as hanging up a phone. Simply place the meter in the“cradle” of Hach’s innovative, skid-resistant docking station,power up, and download data.The docking station featuresgold-plated contacts and a green indicator light to verifycommunication connection. Available for use withsension2 pH/ISE, sension5 Conductivity, sension6Dissolved Oxygen, and sension156 Multi-Parameter Meters.

Worry-free field use. Watertight IP67-rated seal and tough exterior constructionmake portable instruments 100% intrinsically waterproofand floatable. No caps required.

Intuitive user interface.This meter “thinks” the way you do, prompting you through each logical test sequence and displaying your mode and thestatus of your test – all with the fewest keystrokes possible.

Quick calibration. The calibration procedure has been vastly simplified to saveyou time. You can also review prior calibration data at thepush of a button.

Slip-resistant keypad.Designed to give you a solid, comfortable grip in one hand.Tactile-response keypad can be easily operated with left orright hand.

4

Three-Year Warranty

Ultra-fast response. Meters are very responsive to electrode input, tracking and displaying changes in pH in just seconds.

Change batteries in a flash. Replace batteries infrequently and easily. (Typical AA batterylife is six months and battery compartment requires no specialtool to open.)

All-in-one 5-pin connector.Traditional two-plug cablerequirements have been simplified with a handy 5-pinconnector for both probe andtemperature input. sension1,sension2, sension3, and sension4 Meters also feature aBNCSM connection and reference pin.

Anti-glare, backlit screen. Meter rests at an angle to diffuse sunlight and features a special hard-coat finish to further minimize glare and resistscratching. (Backlit screen available on sension2, sension6,and sension156 models only.)

Three-year warranty.Hach stands firmly behind the performance of all sensionmeters for three full years from date of purchase.

Free technical support.Does pH testing have you baffled? You’re not alone. Hach’s highly competent technical support team fields hundreds of calls a week on pH and ISE testing. Not only do you get reliableanswers from your meter and electrode, but free answers to yourtechnical questions for the life of your product. That’s anothernice thing about Hach.

Hach reputation for quality.sension Meters are manufactured by Hach, and we are proudto offer reliable and affordable electrochemical instruments toserve your measurement needs. Hach supplies quality systemsthat provide solutions and simplify water analysis for professionals,municipalities, governments, and industries around the world.

5

6

Basic Portable pH MeterIf you’re looking for a basic, inexpensive meter that producesreliable results, Hach’s sension1 Portable pH Meter is today’sanswer. Rugged and 100% waterproof, this meter won’t let youdown in the field. Powered by long-lasting batteries (estimated 500hours) the sension1 Meter is quick and easy to calibrate,responds quickly to the electrode signal, and “locks on” to pH,millivolt potential, and temperature – the instant your probe stabilizes – displaying results in large readable digits. Metercomes with electrode, buffers, beakers and a step-by-step manual.

Other features:• Slip-resistant keypad for resistance to muddy hands and

easy cleaning

• Anti-glare coating for easy viewing

• 1, 2 or 3 point quick calibration procedure

• Resolution to 0.1, 0.01, 0.001; for the right accuracy when you need it

• Measures/compensates temperature in ˚C or ˚F

• Features electrode holder for easy operation

• Carries the European CE mark

How to OrderThe sension1 Portable pH Meter is supplied with a choice ofelectrodes,AA batteries, buffers (4.01 and 7.00), beakers, andmanual.

51700-10 sension1 Portable pH Meter with Platinum Series pH Electrode (replaceable cartridges)

51700-11 sension1 Portable pH Meter with gel-filled electrode (disposable electrode)

Optional Accessories (more on pages 34-35)45300-00 Electrode stand19380-04 Replacement batteries,AA, pk/427047-00 Electrode washer51899-00 LIS Chamber (for low ionic strength samples)51904-00 Carrying case (soft side)51903-00 Carrying case (hard side)51875-01 Docking station 115V51875-02 Docking station 220V

See page 26 for pH buffer ordering information

Applications:For routine pH measurement in the lab, field, or classroom.

RangepH -2.00 to 19.99

mV ±2000Temperature -10 to 110°C (-50 to 230°F)

ResolutionpH 0.1; 0.01; 0.001 (selectable)

mV 0.1 mVTemperature 0.1°C

AccuracypH ±0.002

mV ±0.2 mV or ±0.1% of reading (whichever is greater)Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

Outputs NoneInputs (1) BNCSMconnector; (1) 5-pin connector;

(1) 2mm single-pin reference connectorPower Requirements 4 alkaline AA batteries

Input Impedance > 1012 OhmsBuffer Recognition Auto; 4.01, 6.86, 7.00, 10.01Display Custom LCDCalibration Points 3-point calibration

Calibration Review User-activated; shows last cal slope, buffers/standardsused and mV in each

Serial Data Output NoneBattery Life 6 months typical use (approx. 500 hrs. continuous)Low Battery Indicator YesWaterproof IP67Dimensions 21.2 x 8.7 x 4.2 cm (8.35 x 3.43 x 1.65")For more complete meter specifications, see pages 18-21.

pH: portable

pH/ISE: portableAdvanced Portable pH/ISE Meter

You won’t believe what you get for the price of this versatileportable meter – ideal for advanced users who still require portabil-ity.The sension2 Portable pH/ISE Meter features all the benefitsof the basic pH portable model plus the capability of directlymeasuring user-selected ion concentration.You also can recall,print, and download data – time/ date- stamped for your con-venience – by using its innovative docking station.The meter’sIP67-rated waterproof seal, backlit screen, quick calibration andresponse, and long-lasting batteries make it perfect for field work.Once you get the feel of the slip-resistant keypad and the intu-itive user interface, you’ll never want to use another meter. Comeswith electrode, buffers, beakers, and fully illustrated manual.

Other features:• Large, readable digits and anti-glare coating for easy viewing • Ultra-fast response to changes in pH; true pH averaging • All-in-one 5-pin connector for easy determination of

temperature and your chosen parameter• Automatic buffer recognition with 4.01, 6.86, 7.00 and

10.01 buffers • Resolution to 0.1, 0.01, 0.001; for the right accuracy when you

need it • Measures/compensates temperature in ˚C or ˚F• Features electrode holder for easy operation• Floatable and watertight IP67-rated seal• Carries the European CE mark

How to OrderThe sension2 Portable pH/ISE Meter is supplied with or with-out the Platinum Series pH Electrode,AA batteries, buffers (4.01and 7.00), beakers and a manual.

51725-10 sension2 Portable pH/ISE Meter with Platinum Series pH Electrode

51725-11 sension2 Portable pH/ISEh Meter without pH electrode

51725-13 sension2 with Platinum Series pH Electrodeand 115V Docking Station

51725-14 sension2 with Platinum Series pH Electrodeand 230V Docking Station

Optional Accessories (more on pages 34-35)45300-00 Electrode stand45300-01 Electrode stirrer stand 115V45300-02 Electrode stirrer stand 230V49665-00 HachLink™ software for computer interface51875-01 Docking station 115V51875-02 Docking station 220V19380-04 Replacement batteries,AA, pk/427047-00 Electrode washer51899-00 LIS Chamber (for low ionic strength samples)51904-00 Carrying case (soft-side)51903-00 Carrying case (hard-side)54671-00 Probe holder


Applications:For advanced field measurements of pH, mV potential,ammonia, nitrate, sodium, cyanide/iodide, ORP, fluoride,calcium, chloride, and many more.

RangepH -2.000 to 19.999

Concentration 0.000 to 19900mV ±2000

Temperature -10 to 110°C (-50 to 230°F)Resolution

pH 0.1; 0.01; 0.001 (selectable)Concentration 0.1; 0.01; 0.001 (selectable)

mV 0.1 mVTemperature 0.1°C

AccuracypH ±0.002

Concentration ±0.5% of readingmV ±0.2 mV or ±0.05% of reading (whichever is greater)

Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºCOutputs One-way, RS-232 via docking stationInputs (1) BNCSM connector, (1) 5-pin connector;

(1) 2mm single-pin reference connectorPower Requirements 4 AA batteries or 110 to 220 Vac line power

through docking stationInput Impedance > 1012 OhmsBuffer Recognition Auto; 4.01, 6.86, 7.00, 10.01; or manual inputDisplay Custom LCDCalibration Points pH: 1, 2 or 3 (1 uses previous calibration slope and

adjusts offset; 2 and 3 create new slope)Calibration Review User-activated; shows last cal slope, date and time,

buffers/standards used and mV in eachSerial Data Output RS-232 through docking stationBattery Life 6 months typical use (approx. 500 hrs. continuous)Low Battery Indicator YesWaterproof IP67 Dimensions 21.2 x 8.7 x 4.2 cm (8.35 x 3.43 x 1.65")For more complete meter specifications, see pages 18-21.

7

8

Basic Benchtop pH MeterA very modest investment puts this compact, powerful meteron your lab bench with room to spare. The sension3 BenchtoppH Meter is fast, easy to calibrate, requires minimal keystrokes,and measures pH, millivolt potential, and temperature.The meterresponds quickly to the electrode signal, features automatic bufferrecognition, and stabilizes in a matter of seconds, displayingresults in large, readable digits. Built-in communication protocolsenable downloading and printing, and unique all-in-one, 5-pinconnector simplifies cabling. Meter comes with electrode,buffers, beakers and illustrated manual.

Other features:• Slip-resistant keypad for easy cleaning• Large, readable digits and anti-glare coating for easy viewing• Resolution to 0.1, 0.01, 0.001; for the right accuracy when you

need it• Time and date stamps data for accurate record keeping• Measures/compensates temperature in ˚C or ˚F• Ultra-fast response to changes in pH; true pH averaging• Carries the European CE mark

How to order The sension3 Benchtop pH Meter is supplied with thePlatinum Series pH Electrode, buffers, (4.01 and 7.00), beakers,and a manual.

51750-10 sension3 Benchtop pH Meter with Platinum Series pH Electrode 115V

51750-11 sension3 Benchtop pH Meter with Platinum Series pH Electrode 220V

51750-12 sension3 Benchtop pH Meter with gel-filled electrode 115V

51750-13 sension3 Benchtop pH Meter with gel-filled electrode 220V

Optional Accessories (more on pages 34-35)45300-00 Electrode stand45300-01 Electrode stirrer stand 115V45300-02 Electrode stirrer stand 230V49665-00 HachLink™ software for computer interface27047-00 Electrode washer51899-00 LIS Chamber (for low ionic strength samples)


Applications:For routine pH measurement in the lab.

pH: benchtop

RangepH -2.000 to 19.999

mV ±2000 mVTemperature -10.0 to 110.0°C (-50 to 230°F)

ResolutionpH 0.1; 0.01; 0.001 (selectable)

mV 0.1Temperature 0.1°C

AccuracypH ±0.002

mV mV: ±0.2 or ±0.05% (whichever is greater)Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

Outputs One-way, RS-232Inputs (1) BNCSM connector; (1) 5-pin connector;

(1) 2mm single reference adapterPower Requirements 110 to 220 Vac line powerInput Impedance > 1012 Ohms

Buffer Recognition Auto; 4.01, 6.86, 7.00, 10.01; or manual inputCalibration Points 1, 2, or 3 (1 uses previous calibration slope and

adjusts offset; 2 and 3 create new slope)

Calibration Review User-activated; shows last cal slope, date and time,buffers/standards used and mV in each

Serial Data Output RS-232Dimensions 15 x 25.4 x 8.37 cm (10.15 x 6 x 3.5")For more complete meter specifications, see pages 18-21.

pH/ISE: benchtopAdvanced Benchtop pH/ISE Meter

Virtually maintenance-free, the sension4 LaboratorypH/ISE/mV Meter offers all the features of the sension3 Meter,including automatic buffer recognition and an extremely friendlyuser interface. The advanced bench model also measures pH andion concentration, each of which can toggle to a millivolt reading.The meter features dual electrode inputs, which enables you tohold calibrations on up to three parameters (i.e., nitrate, pH, andfluoride for drinking water) without recalibrating the instrument.You can also perform single known additions/subtractions andselect your own stability criteria for low-level or very accuratework. This ultra-reliable lab meter comes with an electrode,buffers, beakers, a step-by-step illustrated manual, and access to the best technical support in the industry.

Other features:• Large, readable digits and anti-glare coating for easy viewing• Bi-directional RS-232 communication • Resolution to 0.1, 0.01, 0.001; for the right accuracy when you

need it• Time and date stamps data for accurate record keeping • Recalls, downloads, and prints data• Measures/compensates temperature in ˚C or ˚F• Selectable two-channel operation• Carries the European CE mark

How to OrderThe sension4 Benchtop pH/ISE Meter is supplied with or without Platinum Series pH Electrode, buffers (4.01 and7.00), beakers, and manual.

51775-10 sension4 Benchtop pH/ISE Meter with Platinum Series pH Electrode 115V

51775-11 sension4 Benchtop pH/ISE Meter with Platinum Series pH Electrode 220V

51775-00 sension4 Benchtop pH/ISE Meter without electrode 115V

51775-01 sension4 Benchtop pH/ISE Meter without electrode 220V

Optional Accessories (more on pages 34-35)45300-00 Electrode stand45300-01 Electrode stirrer stand 115V45300-02 Electrode stirrer stand 230V49665-00 HachLink™ software for computer interface27047-00 Electrode washer51899-00 LIS Chamber (for low ionic strength samples)


Applications:For advanced field measurements of pH, mV potential,ammonia, nitrate, sodium, cyanide/iodide, ORP, fluoride,calcium, chloride, and many more. For example, this metercan measure pH, ORP, ammonia, and nitrate at the same time.

RangepH -2.000 to 19.999

Concentration 0.000 to 19900mV ±2000 mV

Temperature -10.0 to 110.0°C (-50 to 230°F)Resolution

pH 0.1/0.01/0.001 (selectable)Concentration 0.1/0.01/0.001 (selectable)

mV 0.1Temperature 0.1°C

AccuracypH ±0.002

Concentration ±0.5% of readingmV ±0.2 or ±0.05% (whichever is greater)

Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºCOutputs Two-way, RS-232Inputs (2) 5-pin connector; (2) BNCSM connector

(2) 2mm single reference adapterPower Requirements 110 to 220 Vac line powerInput Impedance > 1012 Ohms

Buffer Recognition Auto; 1.68, 4.01, 6.86, 7.00, 10.01; 12.45; manual inputCalibration Points pH: 1, 2, 3, 4, or 5 (1 uses previous cal slope and adjusts

offset; 2-5 creates new slope). Concentration: 2-7 point, user input of values within specified concentration

Calibration Review User-activated; shows last cal slope, date and time,buffers/standards used and mV in each

Serial Data Output RS-232Dimensions 15 x 25.4 x 8.37 cm (10.15 x 6 x 3.5")For more complete meter specifications, see pages 18-21.

9

Portable Conductivity MeterNow you can store conductivity data in the field and download it whenyou return to the lab with the sension5 Conductivity Meter and Hach’sunique docking station, which also converts your battery-powered meterto AC power. This meter features a custom digital LCD, which simulta-neously displays – in large, readable digits – your temperature readingand conductivity results in the range of 0 µS to 199.9 mS,TDS from 0to 50,000 mg/L TDS, and 0 to 42 g/L TDS salinity. Waterproof, rugged,and floatable, this meter comes complete with illustrated manual.Thefour-cell conductivity probe measures all ranges inclusive of the meter,so there is no need to purchase other probes for special samples.

Other features:• Slip-resistant keypad for resistance to muddy hands and easy cleaning• Large, readable digits and anti-glare coating for easy viewing• Ultra-fast response to changes in sample• Quick single-point calibration • Long-lasting, easily changed batteries • All-in-one 5-pin connector for easy determination of temperature and your

chosen parameter• Measures/compensates temperature in ˚C or ˚F• Features electrode holder for easy operation• Carries the European CE mark

How to OrderThe sension5 Conductivity Meter is available with a four-cell conduc-tivity probe, 1- or 3-meter cable, sample containers, 1,000 µS/cmstandard, and instruction manual. (Additional standards sold separately.)

51800-10 sension5 Conductivity Meter with electrode 1-meter (40") cable

51800-11 sension5 Conductivity Meter with electrode 3-meter (10') cable

51800-13 sension5 with 1-m Cable Electrode and 115V Docking Station




Conductivity Standards23075-42 180 ± 10 µS/cm, 90 ± 5 mg/L TDS

(85.47 mg/L as NaCl), 100 mL14400-42 1000 ± 10 µS/cm, 500 ± 5 mg/L TDS

(491 mg/L as NaCl), 100 mL2105-42 1990 ± 20 µS/cm, 995 ± 5 mg/L TDS

(1000 mg/L as NaCl), 100 mL23074-42 18,000 ± 50 µS/cm, 9000 ± 25 mg/L TDS

(10246 mg/L as NaCl), 100 mL27143-49 53,000 µS/cm, 35.0 ppt salinity, 500 mL

Optional Accessories (more on pages 34-35)51975-00 Four-cell conductivity probe with 1-meter cable51975-03 Four-cell conductivity probe with 3-meter cable51875-01 Docking station 115V51875-02 Docking station 220V51904-00 Carrying case (soft-sided) 51903-00 Carrying case (hard-sided)19380-04 Replacement batteries,AA, pk/4

Applications:Accurate analysis of water quality for conductivity,salinity, TDS and temperature.

conductivity: portable

RangeConductivity 0 to 199.9 µS/cm; 200 to 1999 µS/cm;

2 to 19.99 mS/cm; 20 to 199.9 mS/cm. TDS 0 to 50,000 mg/L as NaCl

Salinity 0 to 42 g/L (ppt)Temperature -10.0 to 110.0°C

ResolutionConductivity 0.1 µS; 1µS; 0.01 mS; 0.1 mS

TDS 3 significant digitsSalinity 0.1 g/L (ppt)

Temperature ±0.1°CAccuracy

Conductivity ±0.5% in first three ranges; 1.0% at highest rangeTDS ±0.5% of full scale

Salinity ±0.1 ppt (-2 to 35°C)Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

Outputs One-way, RS-232, via docking stationInputs (1) Probe Connection w/Temp, Line PowerPower Requirements 4 AA batteries or 110 to 220 Vac line power

through docking stationDisplay Custom LCDCalibration Points 1 is standard. Mode directly adjusts to cell constantCalibration Review User-activated; shows last cal date,

standards usedBattery Life 6 months typical use (approx. 500 hrs. continuous)Low-Battery Indicator YesDimensions 21.2 x 8.7 x 4.2 cm (8.35 x 3.43 x 1.65")For more complete meter specifications, see pages 18-21.

10

dissolved oxygen: portablePortable Dissolved Oxygen Meter

Accurate, easy to operate and powered by long-lasting AA batteriesor Hach’s exclusive docking station, this waterproof meter reads %saturation as well as mg/L and features autocalibration and a 99-point internal datalogging function. The meter automaticallycorrects for altitude, barometric pressure, and salinity after you keyin the values. The DO probe that comes with the meter can beoutfitted with a BOD Apparatus Kit to facilitate BOD measurements.It also comes with three lengths of cable (1-meter, 3-meter and15-meter) to accommodate a variety of sampling conditions.Meter comes with fully-illustrated manual.


easy cleaning• Backlit screen for easy night-time sampling• Quick calibration • All-in-one 5-pin connector for easy determination of temperature

and DO• Stable resolution to 0.1, 0.01 mg/L; 0.1% saturation• Recalls, downloads, and prints data• Measures/compensates temperature in ˚C or ˚F• Features electrode holder for easy operation • Carries the European CE mark

How to OrderThe sension6 Dissolved Oxygen Meter comes with DO probe(3-meter cable), two membranes, batteries, sample containers,electrolyte filling solution, and manual.

51850-10 sension6 Dissolved Oxygen Meter with 3-m probe51850-01 sension6 Dissolved Oxygen Meter

without probe51850-11 sension6 with 1-m Probe51850-12 sension6 with 15-m Probe51850-13 sension6 with 3-m Cable Probe and 115V

Docking Station51850-14 sension6 with 3-m Cable Probe and 230V





Docking Station

Optional Accessories (more on pages 34-35)51970-00 Replacement DO probe with 1-meter (40") cable51970-03 Replacement DO probe with 3-meter (10') cable51970-15 Replacement DO probe with 15-meter (50') cable51875-01 Docking station 115V51875-02 Docking station 220V51968-00 DO Probe Service Kit (includes two membranes,

electrolyte filling solution, and polishing cloth)51973-00 Membranes for DO probe pk/227591-26 Electrolyte filling solution51971-26 BOD Accessories Kit (includes funnel and

spacer for DO probe Model 51970)19380-04 Replacement batteries,AA, pk/451904-00 Carrying case (soft-sided)51903-00 Carrying case (hard-sided)27584-00 Digital Barometer

Applications:For portable measurement of dissolved oxygen

in aqueous solutions

Range Dissolved Oxygen 0 to 20.0 mg/L; 0-200% saturationTemperature 0 to 50°C

Resolution Dissolved Oxygen 0.01 or 0.1 mg/L; 0.1% saturationTemperature 0.1°C

Accuracy Dissolved Oxygen ±1% full scaleTemperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

Outputs One-way, RS-232 via docking stationInputs (1) Probe Connection w/Temp, Line PowerPower Requirements 4 AA batteries or 110 to 220 Vac line power

through docking stationDisplay Custom LCD

Calibration Points Single PointCalibration Review User-activated; shows last Cal Date, cal mode

and temperatureBattery Life 6 months typical use (approx. 500 hrs. continuous)Low Battery Indicator YesDimensions 21.2 x 8.7 x 4.2 cm (8.35 x 3.43 x 1.65")

For more complete meter specifications, see pages 18-21.

11

12

Benchtop Conductivity MeterNow you can take conductivity measurements in the lab withHach’s benchtop sension7 Conductivity Meter.This laboratorymeter determines conductivity, plus TDS, salinity, and temperaturewith just the push of a button.You will never again have problemscalibrating a conductivity meter, no matter which range you’reusing to measure.The sension7 comes with the new four-cell electrode, which covers the range of 0.1 µS/cm to 200 mS/cm andmeasures all ranges inclusive of the meter, so there is no need topurchase other probes for special samples. Built-in communicationsprotocols (RS-232) enable downloading to either a printer or com-puter. Meter comes complete with illustrated manual, conductivityprobe, and a 1000 µS/cm standard.

Other features:• Slip-resistant keypad for easy cleaning• Large, readable digits and anti-glare coating for easy viewing• Ultra-fast response to changes in sample• Quick single-point calibration• All-in-one 5-pin connector for easy determination of temperature

and your chosen parameter• Time and date stamps data for accurate record keeping• Carries the European CE mark

How to OrderThe sension7 Conductivity Meter comes complete with a four-cellconductivity probe, with a 1-meter cable, 1000 µS/cm standard, andan illustrated instruction manual. (Additional standards sold separately.)

54500-10 sension7 Benchtop Conductivity Meter with electrode, 1-meter (40") cable, 115 V

54500-11 sension7 Benchtop Conductivity Meter with electrode, 1-meter (40") cable, 230 V

Conductivity Standards23075-42 180 ± 10 µS/cm, 90 ± 5 mg/L TDS

(85.47 mg/L as NaCl), 100 mL14400-42 1000 ± 10 µS/cm, 500 ± 5 mg/L TDS

(491 mg/L as NaCl), 100 mL2105-42 1990 ± 20 µS/cm, 995 ± 5 mg/L TDS

(1000 mg/L as NaCl), 100 mL23074-42 18,000 ± 50 µS/cm, 9000 ± 25 mg/L

TDS (10,246 mg/L as NaCl), 100 mL27143-49 53,000 µS/cm, 35.0 ppt salinity, 500 mL

Optional Accessories (more on pages 34-35)

51975-00 Four-cell conductivity probe with 1-meter cable51975-03 Four-cell conductivity probe with 3-meter cable51899-00 LIS chamber (low ionic strength samples)49665-00 HachLink™ software for computer interface

Applications:For accurate analysis of conductivity, salinity, and TDS in aqueous samples in the laboratory.

conductivity: benchtop

RangeConductivity 0-19.99 µS; 20-199.9 µS/cm; 200-1999 µS/cm;

2-19.99 mS/cm; 20-199.9 mS/cmTDS 0-50,000 mg/L as NaCl

Salinity 0-42 ppt (%)Temperature -10 to 105ºC

ResolutionConductivity 0.00-19.99 µS/cm

20.0-199.9 µS/cm200-1999 µS/cm2.00-19.99 mS/cm20.0-199.9 mS/cm

TDS 0.00-199.9 mg/L200-1999 mg/L2.00-19.99 g/L20.0-50 g/L

Salinity 0.1 pptTemperature ±0.1ºC

AccuracyConductivity ±0.5% of range

TDS ±0.5% of full scaleSalinity ±0.1 ppt (-2 to 35ºC)

Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºCConversion Factor for TDS Adjustable automatic or user-adjustableTemperature Compensation Manual (user-selected coefficient, % per ºC) or Automatic

(non-linear based on NaCl solutions)Display Custom LCDInputs 5-pin (with temperature); line powerOutputs One-way, RS-232Power Requirements 110 to 220 Vac line powerInstallation Category IIInstrument Drift <40µV/ºCInput Bias Current <±1 picoamp at 25ºC; ±4 picoamp over full rangeEnvironmental Requirements 0 to 50ºC at 85% noncondensing relative humidityDimensions 15 x 25.4 x 8.37 cm (10.15 x 6 x 3.5")Enclosure Water resistant (IP32), chemical resistantFor more complete meter specifications, see pages 18-21.

RangeDissolved Oxygen 0-20 mg/L (ppm); 2-200% saturation

Temperature 0-50ºCResolution

Dissolved Oxygen 0.01 or 0.1 ppm (mg/L); 0.1% saturationTemperature 0.1ºC

AccuracyDissolved Oxygen ±1% full scale

Temperature ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºCDisplay Custom LCDInputs 5-pin shielded circular connectorOutputs RS-232CPower Requirements 110 to 220 Vac line powerInstallation Category IIInstrument Drift 1%/dayEnvironmental Requirements 5 to 50ºC at 85% relative humidity, noncondensingDimensions 15 x 25.4 x 8.37 cm (10.15 x 6 x 3.5")Enclosure Water resistant (IP32), chemical resistantProbe Dimensions Probe Length 120 mm(Model 50970) Body Diameter 15 mm

Cable Length 1, 3, or 15 metersConnector 5-pin circular


dissolved oxygen: benchtopBenchtop Dissolved Oxygen Meter

Now you can take dissolved oxygen measurements in the lab withHach’s benchtop sension8 Dissolved Oxygen Meter.This laboratorymeter determines dissolved oxygen, reads % saturation and mg/L,and features auto calibration and a 99-point internal dataloggingfunction. It automatically corrects for altitude, barometric pressure,and salinity after you key in the values.The included DO probecan be outfitted with a BOD Apparatus Kit to facilitate BODmeasurements. Electrodes are available in three cable lengths (1-meter, 3-meter, and 15-meter) to accommodate a variety ofsampling conditions, and include a fully illustrated manual.

Other features:• Slip-resistant keypad for easy cleaning• Large, readable digits and anti-glare coating for easy viewing• Quick calibration• All-in-one 5-pin connector for easy determination of temperature

and DO your chosen parameter• Stable resolution to 0.1, 0.01 mg/L; 0.1% saturation• Recalls, downloads, and prints data• Measures/compensates temperature in ˚C or ˚F• Carries the European CE mark

How to OrderThe sension8 Dissolved Oxygen Meter comes with DO probe (four-cell conductivity probe plus a 1-meter cable), two mem-branes, power supply, sample containers, electrolyte fillingsolution, and manual.

54550-10 sension8 Benchtop Dissolved Oxygen Meter with electrode, 1-meter (40") cable, 115 V

54550-11 sension8 Benchtop Dissolved Oxygen Meter with electrode, 1-meter (40") cable, 230 V

Optional Accessories (more on pages 34-35)

51970-00 Replacement DO probe, 1-meter (40") cable

51970-03 Replacement DO probe, 3-meter (10') cable

51970-15 Replacement DO probe, 15-meter (50') cable

51968-00 DO Probe Service Kit (includes two membranes,electrolyte filling solution and polishing cloth)

51973-00 Membranes for DO probe, pk/2

27591-26 Electrolyte filling solution

51971-00 BOD Accessories Kit (includes funeland spacer for DO probe Model 51970)

27584-00 Digital Barometer

49665-00 HachLink™ software for computer interface

Applications:For laboratory measurement of dissolved oxygen

in aqueous solutions.

13

Portable Multi-Parameter MeterBring one instrument into the field with multi-parameter confidence.This meter has the capability to easily measure pH,dissolved oxygen, conductivity,TDS, salinity, and temperature.The sension156 Meter features an intuitive user interface, makingit easy to navigate between parameters.You also get quick calibr-tions with automatic temperature corrections, for consistentlyaccurate, worry-free results. Storing 199 points of data anddownloading are made easy with Hach’s unique docking station,which also converts your battery-powered sension156 to ACpower. Optional accessories, like BOD adapter, carrying case, andLIS chamber will further accommodate this truly flexible meterto your needs.The sension156 package includes the apparatusnecessary for complete multi-parameter testing in the field.

Other features: • Slip-resistant keypad for resistance to muddy hands and

easy cleaning• Anti-glare coating for easy viewing• Backlit screen for easy night-time sampling• 1, 2 or 3 point quick pH calibration procedure• Resolution to 0.1, 0.01, 0.001; for the right accuracy when you

need it• All-in-one 5-pin connector for easy determination of temperature

and your chosen parameter• Measures/compensates temperature in ˚C or ˚F• Built-in barometer for DO samples• Automatic buffer recognition with 4.01, 6.86, 7.00 and

10.01 buffers• Floatable and Watertight IP67-rated seal• User-activated calibration review, time and date stamps for GLP• Many color-coded buffers to choose from• Download data easily with docking station• Can calibrate with either NaCl or KCl• Autocorrects for altitude, barometric pressure, and salinity

Applications:For portable multi-parameter analysis of pH, dissolvedoxygen, conductivity, TDS, salinity and temperature.

14

Range Conductivity Cond. Test: 0 to 199.9 µS/cm; 200 to 1999 µS/cm; 2 to 199.9 mS/cm; 20 to 199.9 mS/cm.

TDS Cond. Test: 0 to 50,000 mg/L as NaClSalinity Cond. Test: 0 to 42 g/L (ppt)

Temperature -10 to 110ºCpH/Cond. Tests DO Test: 0 to 50ºC

pH pH Test: -2.00 to 19.999MV pH Test: ±2000 mV

Dissolved Oxygen DO Test: 0 to 20.0 mg/L; 0.1% saturationResolution pH pH Test: 0.1/0.01/0.001 (selectable)

MV pH/Cond. Tests: 0.1 mVTemperature pH/DO Tests: 0.1ºC

Cond. Test: ±0.1ºCTDS Cond. Test: 3 significant digits

Salinity Cond. Test: 0.1 g/L (ppt)Conductivity Cond. Test: 0.1 µS; 1µS; 0.01 mS; 0.1 mS

Dissolved Oxygen DO Test: 0.01 or 0.1 mg/L; 0.1% saturationAccuracy Conductivity Cond. Test: ±0.5% in first 3 ranges; 1.0% at highest range

TDS Cond. Test: ±0.5% of full scalepH pH Test: ±0.002

Salinity Cond. Test: ±0.1 ppt (-2 to 35ºC)Temperature ±0.3ºC at 0-70ºC

±1.0ºC at 70-110ºCDissolved Oxygen DO Test: ±1% full scale

MV ±0.2 mV or ±0.1% of reading, whichever is greater.Outputs One-way, RS-232 via docking station / 199-point

memory recallInputs (2) 5-pin connectorPower Requirements 4 AA batteries or 110 to 220 Vac line power through

docking station. Input Impedance >1012 OhmsBuffer Recognition Auto; 4.01, 6.86, 7.00, 10.01Display Custom LCD with BacklightCalibration Points pH Test: 3-point calibration

Cond. Test: 1 is standard. Mode directly adjusts to cell constant.DO Test: Single point

Calibration Review User-activated; shows last cal scope, date, standardsused, temperature, buffers/standards, and mV.

Serial Data Output RS-232 via docking stationBattery Life 6 months typical use (500 hours continuous)Low Battery Indicator YesWaterproof Yes, IP67Dimensions 21.2 x 8.7 x4.2 cm (8.35 x 3.43 x 1.65")


How to OrderThe sension156 is structured in six configurations for your convenience: pH/Conductivity, pH/Dissolved Oxygen, and pH/Conductivity/Dissolved Oxygen.

Depending on which configuration you order, the meter will comecomplete with a pH electrode, buffers (4.01 and 7.00), four AA batteries, a four-cell conductivity probe (1-meter cable), conductivitystandard, Dissolved Oxygen probe (3-meter cable), two DO mem-branes, filling solutions, beakers, quick reference card, and anillustrated manual.

54650-10 sension156 Portable pH/Conductivity Meter,with Platinum Series pH Electrode and 4-wire conductivity probe

54650-11 sension156 Portable pH/Conductivity Meter,with conventional pH and 4-wire conductivity probes

54650-12 sension156 Portable pH/Dissolved Oxygen Meter, with Platinum Series pH Electrode and DO probe

54650-13 sension156 Portable pH/Dissolved Oxygen Meter, with conventional pH and DO probes

54650-14 sension156 Portable pH/Conductivity/DissolvedOxygen Meter, with Platinum Series pH Electrode and 4-wire conductivity and DO probes

54650-15 sension156 Portable pH/Conductivity/DissolvedOxygen Meter, with conventional pH, 4-wire conductivity, and DO probes

Optional Accessories (more on pages 34-35)45300-00 Electrode stand45300-01 Electrode stirrer stand 115V45300-02 Electrode stirrer stand 230V49665-00 HachLink™ software for computer interface51875-01 Docking station 115V51875-02 Docking station 220V19380-04 Replacement batteries,AA, pk/427047-00 Electrode washer51899-00 LIS Chamber (for low ionic strength samples)51917-00 Carrying case (hard-side, designed for sension156)

multi-parameter: portable

15

Experience single-instrument, multi-parameter analysis in yourlaboratory.The Hach sension378 has the capability to easilymeasure pH, dissolved oxygen, conductivity,TDS, salinity, andtemperature. Featuring a quick response and intuitive user inter-face, the sension378 corrects temperature automatically andcalibrates easily. Downloading and storage of data are easy andconvenient, with RS-232, 199-point memory recall feature.Thisinstrument will save time, space, and money for your laboratoryprojects, and with HachLink™ software, computer interfacing issimple.The sension378 package includes the apparatus necessaryfor complete multi-parameter use in your lab.


easy cleaning• Anti-glare coating for easy viewing• Backlit screen for easy night-time sampling• 1, 2 or 3 point quick pH calibration procedure• Resolution to 0.1, 0.01, 0.001; for the right accuracy when you

need it• All-in-one 5-pin connector for easy determination of temperature

and your chosen parameter• Measures/compensates temperature in ˚C or ˚F• Automatic buffer recognition with 4.01, 6.86, 7.00 and

10.01 buffers• Floatable and Watertight IP67-rated seal• User-activated calibration review, time and date stamps for GLP• Many color-coded buffers to choose from• Bi-directional RS-232 communication• Autocorrects for altitude, barometric pressure, and salinity

Applications:For multi-parameter analysis of pH, dissolved oxygen, conductivity, TDS, salinity, and temperature in the laboratory.

Benchtop Multi-Parameter Meter

16

Range Conductivity Cond. Test: 0 to 199.9 µS/cm; 200 to 19999 µS/cm; 2 to199.9 mS/cm; 20 to 199.9 mS/cm.

TDS Cond. Test: 0 to 50,000 mg/L as NaClSalinity Cond. Test: 0 to 42 ppt (%)

Temperature pH Test: -10 to 110ºC (-50 to 230ºF)Cond. Test: -10 to 105ºCDO Test: 0 to 50ºC

pH pH Test: -2.00 to 19.999MV pH Test: ±2000 mV

Dissolved Oxygen DO Test: 0 to 20.0 mg/L (ppm); 2-100% saturationResolution pH pH Test: 0.1/0.01/0.001 (selectable)

MV pH Test: 0.1 mVTemperature 0.1ºC

TDS Cond. Test: 0.00-199.9 mg/L; 200-1999 mg/L; 2.00-19.9g/L; 20.0-50 g/L; 0.1 mg/L; 1 mg/L; 0.01 g/L; 0.1 g/L

Salinity Cond. Test: 0.1 pptConductivity Cond. Test: 0.00-19.99 µS/cm; 20.0-199.9 µS/cm; 200-

1999 µS/cm; 2.00-19.99 mS/cm; 20.0-199.9 mS/cm; 0.01µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mg/L; 1mg/L; 0.01 g/L; 0.1 g/L

Dissolved Oxygen DO Test: 0.01 or 0.1 mg/L; 0.1% saturationAccuracy Conductivity Cond. Test: ±0.5% of range

TDS Cond. Test: ±0.5% of full scalepH pH Test: ±0.002

Salinity Cond. Test: ±0.1 ppt (-2 to 35ºC)Temperature ±0.3ºC at 0-70º

±1.0ºC at 70-110ºCDissolved Oxygen DO Test: ±1% full scale

MV pH Test: ±0.2 mV or ±0.05% of reading, whichever is greater.

Outputs Two Way, RS-232 Inputs (2) 5-pin connectorPower Requirements 110 to 220 Vac line powerInput Impedance >1012 OhmsBuffer Recognition pH Test: Auto; 4.01, 6.86, 7.00, 10.01Display Custom LCD Calibration Points pH Test: 1, 2, or 3 (1 uses previous calibration slope and

adjusts offset; 2 and 3 create new slope)Cond. Test: 1 is standard. Mode directly adjusts to cell constant.DO Test: Single point

Calibration Review User-activated; shows last cal scope, date, standards used,temperature, buffers/standards, and mV.

Serial Data Output RS-232; 199-point memory recallInstallation Category IIInstrument Drift pH/Cond. Tests: <40µV/ºC

DO Test: <1% per dayInput Bias Current <±1 picoamp at 25ºC; ±4 picoamp over full rangeEnvironmental Requirements 0 to 50ºC at 85% noncondensing relative humidityWaterproof Yes, IP67

Dimensions 15 x 25.4 x 8.37 cm (10.15 x 6 x 3.5”)Enclosure Water Resistant (IP32), chemical resistant


multi-parameter: benchtop

17

How to OrderThe sension378 is structured in several convenient configurations:pH/Conductivity, pH/Dissolved Oxygen, and pH/ Conductivity/Dissolved Oxygen. Depending on which structured instrumentyou order, you will receive a pH electrode, buffers (4.01 and 7.00),a four-cell conductivity probe (1-meter cable), conductivity standard, DO probe (1-meter cable), two membranes, electrolytefilling solution,power supply, beakers, quick reference card, andan illustrated manual.

54750-10 sension378 Laboratory pH/Conductivity Meter, 115V, with Platinum Series pH Electrode and 4-wire conductivity probe

54750-11 sension378 Laboratory pH/Conductivity Meter 115V, with conventional pH and 4-wire conductivity probes

54750-12 sension378 Laboratory pH/Dissolved Oxygen Meter 115V, with Platinum Series pH Electrode and DO probe

54750-13 sension378 Laboratory pH/Dissolved Oxygen Meter 115V, with conventional pH and DO probes

54750-14 sension378 Laboratory pH/Conductivity/ Dissolved Oxygen Meter 115V, with PlatinumSeries pH Electrode and 4-wire conductivity and DO probes

54750-15 sension378 Laboratory pH/Conductivity/ Dissolved Oxygen Meter 115V, with conventional pH, 4-wire conductivity,and DO probes

54750-16 sension378 Laboratory pH/Conductivity Meter 220V, with Platinum Series pH Electrode and 4-wire conductivity probe

54750-17 sension378 Laboratory pH/Conductivity Meter 220V, with conventional pH and 4-wire conductivity probes

54750-18 sension378 Laboratory pH/Dissolved Oxygen Meter 220V, with Platinum Series pH Electrode and DO probe

54750-19 sension378 Laboratory pH/Dissolved Oxygen Meter 220V, with conventional pH and DO probes

54750-20 sension378 Laboratory pH/Conductivity/ Dissolved Oxygen Meter 220V, with PlatinumSeries pH Electrode and 4-wire conductivity and DO probes

54750-21 sension378 Laboratory pH/Conductivity/ Dissolved Oxygen Meter 220V, with conventional pH, 4-wire, and DO probes

Optional Accessories (more on pages 34-35)45300-00 Electrode stand45300-01 Electrode stirrer stand 115V45300-02 Electrode stirrer stand 230V49665-00 HachLink™ software for computer interface

18

Meter specifications

pH: -2.000 to 19.999 pH: -2.000 to 19.999

mV: ±2000 mV: ±2000Temperature: -10 to 110°C Temperature: -10 to 110°C(-50 to 230°F) (-50 to 230°F)

pH: 0.1; 0.01; 0.001 (selectable) pH: 0.1; 0.01; 0.001 (selectable)Concentration: 0.1; 0.01; 0.001 selectable

mV: 0.1 mV: 0.1Temperature: 0.1°C Temperature: 0.1°C

pH: ±0.002 pH: ±0.002mV: ±0.2 mV or ± 0.05% of reading mV: ±0.2 or ±0.05% of reading

(whichever is greater) (whichever is greater)

Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

None One-way, RS-232, via docking station

(1) BNC; (1) 5-pin connector; (1) BNC; (1) 5-pin connector;(1) 2mm single-pin reference connector (1) 2mm single-pin reference connector

4 AA Batteries Battery or 110 to 220 Vacline power through docking station line power through docking station

> 1012 Ohms > 1012 Ohms

Auto; 4.01, 6.86, 7.00, 10.01 or Auto; 4.01, 6.86, 7.00, 10.01 or manual input manual input

Custom LCD Custom LCD/Backlight

1, 2, or 3 (1 adjusts offset and uses 1, 2, or 3 (1 adjusts offset and uses previous calibration slope; 2 and 3 previous calibration slope; 2 and 3 create new slope) create new slope)

User-activated; shows last calibration User-activated; shows last calibration slope, date and time, buffers/standards slope, date and time, buffers/standardsused and mV in each used and mV in each

Auto or manual (if probe not connected) Auto or manual (if probe not connected)Selectable manual temperature input Selectable manual temperature input(-10 - 110°C for probe temperature) (-10 - 110°C for probe temperature)

48-65 mV/decade allowable 48-65 mV/decade allowable

None RS-232, via docking stationRecall 99-point memory

6 months typical use 6 months typical use(approx. 500 hrs. continuous) (approx. 500 hrs. continuous)

Yes Yes

IP67 IP67

Meter: 0.785 kg (1.75 lb) Meter: 0.785 kg (1.75 lb)Docking Station: 0.45 kg (12 oz) Docking Station: 0.45 kg (12 oz)

21.2 x 8.7 x 4.2 cm 21.2 x 8.7 x 4.2 cm(8.35 x 3.43 x 1.65") (8.35 x 3.43 x 1.65")

portable pH meter portable pH/ISE meter

Model

Range

Resolution

Accuracy

Outputs

Inputs

PowerRequirementsInputImpedance

BufferRecognition

DisplayCalibrationPoints

CalibrationReview

TemperatureCompensation

Slope

Serial Data

Battery Life

Low-BatteryIndicator

Waterproof

Shipping Weight

Dimensions

19

pH: -2.000 to 19.999 pH: -2.000 to 19.999 Conductivity: 0 to 199.9 µS/cm; Concentration: 0.000 to 19900 200 to 1999 µS/cm; 2 to 19.99 mS/cm;

mV: ±2000 mV: ±2000 20 to 199.9 mS/cm. Temperature: -10.0 to 110°C Temperature: -10.0 to 110°C TDS: 0 to 50,000 mg/L as NaCl(-50 to 230°F) (-50 to 230°F) Salinity: 0 to 42 g/L (ppt)

Temperature: -10.0 to 110.0°C

pH: 0.1; 0.01; 0.001 (selectable) pH: 0.1; 0.01; 0.001 (selectable) Conductivity: 0.1 µS; 1 µS; 0.01 mS; 0.1 mSConcentration: 0.1; 0.01; 0.001 selectable TDS: 3 significant digits

Salinity: 0.1 g/L (ppt) mV: 0.1 mV: 0.1Temperature: 0.1°C Temperature: 0.1°C Temperature: ±0.1°C

pH: ±0.002 pH: ±0.002 Conductivity: ±0.5% of all four ranges;mV: ±0.2 or ±0.05% mV: ±0.2 or ±0.05%

(whichever is greater) (whichever is greater) TDS: ±0.5% of full scale Salinity: ±0.1 ppt (-2 to 35°C)

Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

One-way, RS-232 Two-way, RS-232 One-way, RS-232, via docking station

(1) BNC; (2) 5-pin connector; (2) BNC; (2) 5-pin connector; (1) Probe Connection (1) 2mm single-pin reference connector (2) 2mm single-pin reference connector w/Temperature, Line Power

110 to 220 Vac line power 110 to 220 Vac line power Battery or 110 to 220 Vacline power through docking station

> 1012 Ohms > 1012 Ohms > 1012 Ohms

Auto: 1.68, 4.01, 6.86, 7.00, 10.01 Auto: 1.68, 4.01, 6.86, 7.00, 10.01, 12.45 or N/Amanual input

Custom LCD Custom LCD Custom LCD

1, 2, or 3 (1 adjusts offset and uses pH: 1, 2, 3, 4, or 5 (1 adjusts offset; uses previous 1 is standard. Mode directly adjusts toprevious calibration slope; 2 and 3 calibration slope; 2-5 creates new slope). cell constant. create new slope) Concentration: 2-7 point, user input

values within specified concentration

User-activated; shows last calibration User-activated; shows last calibration User-activated; shows last calibration date,slope, date and time, buffers/standards slope, date and time, buffers/standards standards usedused and mV in each used and mV in each

Auto or manual (if probe not connected) Auto or manual (if probe not connected) Auto (probes will always be Selectable manual temperature input Selectable manual temperature input thermistor-equipped)(-10 - 110°C for probe temperature) (-10 - 110°C for probe temperature) (-10 - 110°C for probe temperature)

48-65 mV/decade allowable 48-65 mV/decade allowable N/A

RS-232 RS-232 RS-232, via docking stationRecall 99-point memory Recall 99-point memory Recall 99-point memory

N/A N/A 6 months typical use(approx. 500 hrs. continuous)

N/A N/A Yes

N/A N/A IP67

Meter: 0.675 kg (1.5 lb) Meter: 0.785 kg (1.75 lb) Meter: 0.675 kg (1.5 lb)Docking Station: 0.45 kg (12 oz)

15 x 25.4 x 8.37 cm 15 x 25.4 x 8.37 cm 21.2 x 8.7 x 4.2 cm(10.15 x 6 x 3.5") (10.15 x 6 x 3.5") (8.35 x 3.43 x 1.65")

benchtop pH meter benchtop pH/ISE meter portable conductivity meter

Model

Range

Resolution

Accuracy

Outputs

Inputs

PowerRequirements

InputImpedance

BufferRecognition

DisplayCalibration

Points

CalibrationReview


Slope

Serial Data

Battery Life


Waterproof

Shipping Weight

Dimensions

20

Meter specifications

portable dissolved oxygen meter benchtop conductivity meter

Model

Range

Resolution

Accuracy

Outputs

Inputs

PowerRequirements

InputImpedance

BufferRecognition

DisplayCalibrationPoints

CalibrationReview


Slope

Serial Data

Battery Life


Waterproof

Shipping Weight

Dimensions

Dissolved Oxygen:0 to 20.0 mg/L; 0-200% saturation

Temperature:0 to 50°C

Dissolved Oxygen:0.01 or 0.1 mg/L; 0.1% saturation

Temperature:0.1°C

Dissolved Oxygen:±1% full scale

Temperature:±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

One-way, RS-232 via docking station

(1) Probe Connection – 5-pin

4 AA batteries or 110 to 220 Vac line power through docking station

> 1012 Ohms

N/A

Custom LCD/Backlight

Single Point

User-activated; shows last Cal Date, cal mode and temperature

Auto (probes will always be thermistor-equipped)0 to 50ºC

N/A

RS-232, via docking stationRecall 99-point memory

6 months typical use (approx. 500 hrs. continuous)

Yes

IP67, submersible to one meter

Meter: 0.675 kg (1.5 lb)Docking Station: 0.45 kg (12 oz)

21.2 x 8.7 x 4.2 cm(8.35 x 3.43 x 1.65")

Conductivity:0-19.99 µS; 20-199.9 µS/cm; 200-1999 µS/cm; 2-19.99 mS/cm; 20-199.9 mS/cm

TDS: 0-50,000 mg/L as NaClSalinity: 0-42 ppt (%)Temperature: -20 to 105ºC

Conductivity: 0.00-19.99 µS/cm; 0.01 µS/cm; 20.0-199.9 µS/cm; 0.1µS/cm; 200-1999 µS/cm; 1 µS/cm; 2.00-19.99 mS/cm;0.01 mS/cm; 20.0-199.9 mS/cm; 0.1 mS/cm

TDS:0.00-199.9 mg/L; 0.1 mg/L; 200-1999 mg/L; 1 mg/L;2.00-19.99 g/L; 0.01 g/L; 20.0-50 g/L; 0.1 g/L

Salinity: 0.1 pptTemperature: ±0.1ºC

Conductivity: ±0.5% of rangeTDS: ±0.5% of full scaleSalinity: ±0.1 ppt (-2 to 35ºC)Temperature: ±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

One-way, RS-232

(1) Probe Connection – 5-pin

110 to 220 Vac line power

> 1012 Ohms

N/A

Custom LCD

1 is standard – Adjusts to cell content

User-activated; shows last Cal Date, cal modeand temperature

Auto (probes will always be thermistor-equipped)-10 - 110°C for probe temperature

N/A

RS-232Recall 99-point memory

N/A

N/A

Water resistant (IP32), chemical resistant

Meter: 0.785 kg (1.75 lb)

15 x 25.4 x 8.37 cm(10.15 x 6 x 3.5")

21

benchtop dissolved oxygen meter portable multi-parameter meter benchtop multi-parameter meter

Model

Range

Resolution

Accuracy

Outputs

Inputs

PowerRequirements

InputImpedance

BufferRecognition

DisplayCalibration

Points

CalibrationReview


Slope

Serial Data

Battery Life


Waterproof

Shipping Weight

Dimensions

Dissolved Oxygen:0-20 mg/L (ppm); 2-200% saturation

Temperature:0-50ºC

Dissolved Oxygen:0.01 or 0.1 ppm (mg/L); 0.1% saturation

Temperature:0.1ºC

Dissolved Oxygen:±1% full scale

Temperature:±0.3ºC at 0-70ºC; ±1.0ºC at 70-110ºC

RS-232C

5-pin shielded circular connector


> 1012 Ohms

N/A

Custom LCD

Single point

User-activated; shows last cal scope, date,cal mode, and temperature.

Auto (probes will always be thermistor-equipped)-10 - 110 °C for probe temperature

N/A

RS-232Recall 99-point memory

N/A

N/A


Meter: 0.785 kg (1.75 lb)

15 x 25.4 x 8.37 cm(10.15 x 6 x 3.5")

Conductivity Test: 0 to 199.9 µS/cm; 200 to 1999 µS/cm; 2 to 199.9 mS/cm; 20 to 199.9 mS/cm.

TDS Cond. Test: 0 to 50,000 mg/L as NaClSalinity Cond. Test: 0 to 42 g/L (ppt)Temperature pH/Cond. Tests: -10 to 110ºCDO Test: 0 to 50ºCMV pH Test: ±2000 mVDissolved Oxygen (DO) Test: 0 to 20.0 mg/L; 0.1% saturation

pH Test: 0.1/0.01/0.001 (selectable)MV pH/Cond. Tests: 0.1 mVTemperature pH/DO Tests: 0.1ºCCond. Test: ±0.1ºCTDS Cond. Test: 3 significant digitsSalinity Cond. Test: 0.1 g/L (ppt)Conductivity Cond. Test: 0.1 µS; 1 µS; 0.01 mS; 0.1 mSDissolved Oxygen (DO) Test: 0.01 or 0.1 mg/L; 0.1% saturationConductivity Test: ±0.5% in first 3 ranges; 1.0% at highest rangeTDS Cond. Test: ±0.5% of full scalepH Test: ±0.002Salinity Cond. Test: ±0.1 ppt (-2 to 35ºC)DO Test: ± 1% full scaleMV ±0.2 mV or ±0.1% of reading, whichever is greater.

One-way, RS-232 via docking station / 199-point memory recall

(2) 5-pin connector

4 AA batteries or 110 to 220 Vac line power through docking station.

>1012 Ohms

Auto; 4.01, 6.86, 7.00, 10.01

Custom LCD with Backlight

pH Test: 1, 2, or 3 (1 uses previous calibration slope andadjusts offset; 2 and 3 create new slope)Cond. Test: 1 is standard. Mode directly adjusts

to cell constant.DO Test: Single point

User-activated; shows last cal scope, date, time, temperature, buffers/standards used.


N/A

RS-232, via docking station199-point memory recall

6 months typical use (500 hours continuous)

Yes

Yes, IP67

Meter: 0.675 kg (1.5 lb)Docking Station: 0.45 kg (12 oz)

21.2 x 8.7 x 4.2 cm(8.35 x 3.43 x 1.65")

Conductivity Test: 0 to 199.9 µS/cm; 200 to 19999 µS/cm; 2 to 199.9 mS/cm; 20 to 199.9 mS/cm.

TDS Cond. Test: 0 to 50,000 mg/L as NaClSalinity Cond. Test: 0 to 42 ppt (%)Temperature pH Test: -10 to 110ºC (-50 to 230ºF)DO Test: 0 to 50ºCpH Test: -2.00 to 19.999MV pH Test: ±2000 mVDissolved Oxygen (DO) Test: 0 to 20.0 mg/L (ppm); 2-100% saturation

pH Test: 0.1/0.01/0.001 (selectable)MV pH Test: 0.1 mVTemperature: 0.1ºCTDS Cond. Test: 0.00-199.9 mg/L; 200-1999 mg/L; 2.00-19.9

g/L; 20.0-50 g/L; 0.1 mg/L Conductivity Test: 0.00-19.99 µS/cm; 20.0-199.9 µS/cm;

200-1999 µS/cm; 2.00-19.99 mS/cm; 20.0-199.9 mS/cm;0.01 µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mg/L; 1 mg/L; 0.01 g/L; 0.1 g/L

Dissolved Oxygen (DO) Test: 0.01 or 0.1 mg/L; 0.1% saturation

Conductivity Test: ±0.5% of rangeTDS Cond. Test: ±0.5% of full scalepH Test: ±0.002Salinity Cond. Test: ±0.1 ppt (-2 to 35ºC)Temperature ±0.3ºC at 0-70º; ±1.0ºC at 70-110 ºCDO Test: ±1% full scaleMV pH Test: ±0.2 mV or ±0.05% of reading, whichever is greater.

Two Way, RS-232

(2) 5-pin connector


>1012 Ohms

pH Test: Auto; 4.01, 6.86, 7.00, 10.01

Custom LCD

pH Test: 1, 2, or 3 (1 uses previous calibration slope andadjusts offset; 2 and 3 create new slope)Cond. Test: 1 is standard. Mode directly adjusts to

cell constant.DO Test: Single point

User-activated; shows last cal scope, date, time, temperature, buffers/standards used.


N/A

RS-232 199-point memory recall

6 months typical use (500 hours continuous)

Yes


Meter: 0.785 kg (1.75 lb)

15 x 25.4 x 8.37 cm(10.15 x 6 x 3.5")

22

Vastly improved and extremely robust, Hach’s sension Platinum Series Electrodes have provenexceptional in performance trials and are ready to make your life a lot easier.

Why do sension Platinum Series Electrodes perform betterthan ever? We’ve taken the best features of our celebrated(and still fully patented) reference technology and incorpo-rated them into a highly efficient and long-lasting electrode,distinguished by a superior, glass-to-platinum seal. Hach formulated glass membrane provides increased accuracy and quick response time for all water solutions.

In addition to the inherent benefits of our non-porous, free-flowing reference – designed for maximum consistency of flow…

• You’ll notice a crisp, more consistent feel to the dispenser.

• You’ll enjoy a significantly faster response to pH changes.

• You’ll further accelerate testing with a much faster temperature response.

Scrupulously reformulated glass.Complete with new leakproof, glass-to-platinum seal, the sensionPlatinum Series half-cell has been optimized for increased accuracyand an ultra-fast response – even in cold, near-neutral samples.

Low Ionic Strength (LIS) Sample Chamber. Reduce the potential for CO2 interference in pH measurementwith the LIS Sample Chamber from Hach. Ideal for grab-sampling,flow-through testing, and conductivity testing of samples character-ized by low ionic strength, the LIS Chamber isolates the samplefrom the atmosphere, preserving the integrity of your pH results.(See page 34 for more details.)

Quick temperature response.Design of thermistor and housing reduces temperature response time.

Better reference.Easier-to-purge reference assures continuous, unimpeded flow ofelectrolyte from the cartridge right down to the junction, whereit makes contact with the sample.

Reliable dispenser.Dispenser action is smooth and consistent, refreshing the reference junction for each measurement with precisely 6 µL of reference solution.

Long-lasting electrolyte.Easy-to-replace cartridges replenish gel supply without having to replace electrode.

Step-by-Step Procedures!Hach’s popular procedures – complete with simplified, illustrated instructions and helpful testingtips – are shipped with every sension electrode.

pH Tipwith glass bulb membrane, thermistor and reference

Nitrate Tipwith PVC membraneand reference

Introducing sension™ Platinum Series Electrodes

Sodium Tipwith glass bulb mem-brane and reference

23

4.00 5.00 6.002.00 3.001.00

6.60

7.20

7.10

7.00

6.90

6.80

6.70

6.500.00 7.00 8.00 9.00 10.00

0%-1%-2%-3% 1% 2% 3%

1.981.961.94 2.02 2.04 2.06

Repeatable Results, Time After Time.Hach’s Platinum Series Nitrate ISE was tested against a comparable probe in seven identical trials. Both NitrateISEs were dipped and removed from the same sample seventimes and results were recorded. As the chart above indicates,the Hach Nitrate ISE demonstrated less than half the noise.Why pay twice as much for a nitrate ISE when you can getaccurate, repeatable results, time after time, with Hach’s newPlatinum Series Nitrate ISE?

Assured Accuracy.Analysts who routinely measure sodium know how sluggishand unpredictable the reading can be. What if you couldprogram your meter to accept your sodium reading onlyafter it has stabilized? With the sension4 Laboratory pH/ISEMeter and a Platinum Series Sodium ISE, you can. Hach’sproprietary sodium glass bulb also reduces the chance ofpotassium error.

Go ahead and try them, risk-free!

1. Pair Hach’s improved electrodes with our sensational sension Meters.

2. Add your choice of buffers, cases, and other helpful accessories.

3. Use our illustrated manuals and free technical support.

4. You’ll never again turn to another supplier for your electrochemical testing needs.

Call 800.227.4224 for ordering assistance today!

Fast Response Time.Whether you’re testing routine water and wastewater samples,or difficult-to-measure samples of low ionic strength (likedrinking water, environmental water, and ultrapure water),Hach’s sension Platinum Series Electrodes will get the jobdone quickly, accurately, and far more economically thancomparable premium probes.

In performance trials, Platinum Series Electrodes (includingpH, nitrate, and sodium) proved equal or better than the competition in three important categories:1) Response time 2) Repeatability 3) Accuracy.

Affordable Hach Platinum Series pH Electrode

Low-cost non-refillable gel pH electrode

High-cost free flowing referencejunction pH electrode

pH

Time/minutes

Reproducibility ±0.65% reported as % relative

standard deviation

Reproducibility ±1.72% reported as % relative

standard deviation

Other Premium Hach Platinum Series pH Electrode withpH Electrode free-flowing reference

Price Range Medium High

Temperature Built-in temperature probe No temperature probe

Procedures Fully-illustrated, iconed procedures No illustrated procedures

Electrolyte At the click of a button, precise To refresh junction, refer-Release 6 µL amounts of electrolyte ence electrolyte is dumped

dispense to refresh the reference in uncontrolled amounts ofjunction, without contaminating approximately 2 mL, wast-sample in which electrode ing about half the electrolyte.is immersed. (Leak rate is approximately

1 mL per day.)

Junction Single reference junction features gel- Double reference junctionsample interface which cannot clog. uses outer annular-ring,

which dispenses electrolyteimprecisely, and inner frit which may clog.

Reference Reference electrolyte reservoir is Reference electrolyte Electrolyte sealed when in use, so no contamin- filling hole is open, making Reservoir ation or spillage is possible. it prone to spillage and

contamination.

Dispenser Improved dispenser provides smooth Flushing mechanism tendsand consistent action every time. to clog, due to KCI crystal

build-up during storage.

LIS Suitable for low ionic strength waters Suitable for low ionic Application strength waters

Warranty One year One year

Hach Platinum Series Nitrate

Comparable High-Cost Nitrate

value of sample:2.00 mg/L NO3

-N

Electrodes that go the distance

pH Electrodes and Accessories

24

Electrode Description Electrode Range Slope Temperature Type Range

Platinum Series Ideal for measuring easy samples and difficult-to-measure Glass Membrane pH: 58 (±3) Continuous Use:pH Combination samples of low ionic strength, Hach’s new Platinum Series 0 to 14 mV/decade 0 to 45°C (with temperature) is unexcelled in response time, repeatability and stability. (32 to 113°F)

51910 Maximum Use:0 to 100°C (32 to 212°F)

pH Combination Our most robust gel-filled probe ever introduced, this inexpensive Glass Membrane pH: 58 (±3) Continuous Use:(with temperature) electrode is less susceptible to clogging and features a wick-type 0 to 14 mV/decade at 0 to 45°C

reference junction and built-in thermistor. Easy to use, needs no 25°C (32 to 113°F)51935 refilling, and requires little or no maintenance.

Maximum Use:0 to 100°C(32 to 212°F)

Refillable Combination Hach’s new refillable electrode is conveniently designed for Glass Membrane pH: 58 (±3) Continuous Use:Electrode easy refilling and use. 0 to14 mV/decade at 0 to 45°C

5194025°C (32 to 113°F)

Maximum Use:0 to 100°C(32 to 212°F)

Platinum Series Designed for testing surfaces such as foods, agar plates, skin, Glass Membrane pH: 58 (±3) Continuous Use:pH Combination semi-solid substances, and small volumes, Hach’s new flat-end 0 to 14 mV/decade 0 to 45°C Flat-End Platinum Series electrode offers fast response, repeatability, (32 to 113°F)

and stability. Easier to clean than standard round bulbs.51915 Maximum Use:

0 to 80°C(32 to 176°F)

25

Dimensions Interferences Electrode Only Electrode Accessories

Diameter: Na+ 51910-00 25469-02 Potassium Chloride Electrolyte Cartridge, pk/212.7 mm (0.50") above pH 12 pH Platinum Series Combination Electrode (use with sension Meters) 26573-64 pH Storage Solution Powder Pillows, pk/20

Features 5-pin connector. Includes two electrolyte cartridges and manual. 50301-49 pH Electrode Storage Solution, 500 mLTotal Length: 22992-64 Buffer Powder Pillows, pH 4.0 and 7.0, pk/20241 mm (9.5") 51910-22 (See Buffer Chart on pages 26-27.)

pH Platinum Series Combination Electrode (use with EC Meters) 51899-00 Low Ionic Strength ChamberCable Length: Features BNC and DIN connectors. Includes two electrolyte cartridges (See additional accessories on pages 34-35.)1 m (36") and manual.

51910-11pH Platinum Series Combination Electrode (use with Hach One Meters)

Features BNC connector and 3.5 mm phone connector. Includes two electrolyte cartridges and manual.

Diameter: Na+ 51935-00 26573-64 pH Storage Solution Powder Pillows, pk/2012.1 mm (0.475") above pH 12 pH Gel-Filled Combination Electrode (use with sension Meters) (See Buffer Chart on pages 26-27.)

Features 5-pin connector. Includes manual. 50301-49 pH Electrode Storage Solution, 500 mLTotal Length:152.5 mm (6") 51935-22

pH Gel-Filled Combination Electrode (use with EC Meters)Cable Length: Features BNC and DIN connectors. Includes manual. 1 m (36")

51935-11pH Gel-Filled Combination Electrode (use with Hach One Meters)

With BNC and 3.5 mm phone connector. Includes manual.

Diameter: Na+ 51940-00 51941-00 Filling Solution12.1 mm (0.475") above pH 12 Refillable Combination Electrode (use with sension Meters) 26573-64 pH Storage Solution Powder Pillows, pk/20

Features 5-pin connector. Includes manual. (See Buffer Chart on pages 26-27.)Total Length: 50301-49 pH Electrode Storage Solution, 500 mL152.5 mm (6") 51940-22

Refillable Combination Electrode (use with EC Meters)Cable Length: Features BNC and DIN connectors. Includes manual. 1 m (36")

51940-11Refillable Combination Electrode (use with Hach One Meters)

With BNC and 3.5 mm phone connector. Includes manual.

Diameter: Na+ 51915-00 25469-02 Potassium Chloride Electrolyte Cartridge, pk/212.7 mm (0.50") above pH 12 pH Platinum Series Combination Flat-End Electrode 26573-64 pH Storage Solution Powder Pillows, pk/20

(use with ALL Hach meters) 50301-49 pH Electrode Storage Solution, 500 mLTotal Length: Features BNC connector. Includes two electrolyte cartridges and manual. 51899-00 Low Ionic Strength Chamber229 mm (9.0")

Cable Length:1 m (36")

Ensure your meters are calibrated accurately with Hach pHstandardization buffers in a variety of packaged solutions tomeet your needs. Color-coded for convenience, and availablein pH 4.00 (red), 7.00 (yellow) and 10.00 (blue), all Hach pHbuffers follow U.S. National Institute of Standards andTechnology (NIST) formularies and have an accuracy of ±0.02pH units at 25˚/4˚C.

Singlet™Solution PacksSinglet™ single-use standard solutions are ideal for on-site analysis,eliminating the need to prepare standardized buffer solutions forpH meter calibration.You can have fresh pH buffer solutionswithout having to purchase and carry deionized or demineralizedwater.The convenient foil-pouch packaging maintains freshness,keeps the solutions contaminant-free, ready to travel with you anywhere.

Each package contains 20 mL of color-coded solution, individuallylabeled.To use, simply tear open the pouch and insert the electrode.No mixing, no measuring. Meter calibration has never beenfaster or easier.

pH Buffers and Solutions

Singlet™ Solution PacksItem Quantity Cat. No. pH 7.00 and pH 10.01 Buffer Solution pk/10 of each 27698-20

pH 4.01 and pH 7.00 Buffer Solution pk/10 of each 27699-20

pH 4.01 Buffer Solution pk/20 27700-20



Electrode Rinse Solution pk/20 27703-20

180 µS/cm Conductivity Standard Solution pk/20 27704-20



18,000 µS/cm Conductivity Standard Solution pk/20 27707-20


26

Singlet™ Solution PacksItem Quantity Cat. No. pH 7.00 and pH 10.01 Buffer Solution pk/10 of each 27698-20

pH 4.01 and pH 7.00 Buffer Solution pk/10 of each 27699-20




Electrode Rinse Solution pk/20 27703-20






pH BuffersHach standard calibration buffers are available in convenient,unit-dose powder pillows or color-coded liquids. Powder pillows assure freshness and eliminate the possibility of contamination.They are recommended for automatic calibration.Simply open the pillow and add the contents to 50 mL ofdeionized or demineralized water. Both liquid and powderbuffers assure accuracy (±0.02 pH units) and are NIST* traceable.

Calibration StandardsHach’s high-quality, low-cost standards for ISE calibrations areaccurate and stable to ensure that your ion measurements areas precise as possible. Hach standards are available in liquidform, in a variety of concentrations and quantities. (Nitrogenand potassium are also available in Voluette™ Ampules.) See thefollowing pages for information on ISE calibration standards.*U.S. National Institute of Standards and Technology

pH BuffersBuffers with pH values of 4.01, 7.00 and 10.00 are color-codedfor added convenience. All carry the DOT† code ∆NR and arefor 50-mL solution volumes. pH is ± 0.02 at 25°C.

pH Quantity Cat. No.4.01 (Red) 15 22269-95

50 22269-66250 22269-64

5.00 15 14097-956.00 50 14055-666.86 15 14098-957.00 (Yellow) 15 22270-95

50 22270-66250 22270-64

8.00 15 14079-959.00 15 14107-95

50 14107-66250 14107-64

9.18 15 14102-9510.00 (Blue) 15 22271-95

50 22271-66250 22271-64

4.01 (Red) 7.00 (Yellow) 10 of each 22992-64

pH Buffer SolutionsAll solutions are color-coded for convenience.All carry the DOT† code ∆NR and are for 50-mL solution volumes. pH is ± 0.02 at 25°C.

pH Quantity Cat. No.4.00 (Red) 500 mL 22834-49

4 L 22834-567.00 (Yellow) 500 mL 22835-49

4 L 22835-5610.00 (Blue) 500 mL 22836-49

4 L 22836-56

†U.S. Department of Transportation

27

ISE Calibration StandardsParameter Concentration Quantity Cat. No. Ammonia 100 mg/L 500 mL 24065-49

Calcium 10 mg/L 500 mL 23054-49

100 mg/L 500 mL 44576-49

1000 mg/L 500 mL 22403-49

Chloride 100 mg/L 1 L 23708-53

1000 mg/L 500 mL 183-49

Fluoride 1 mg/L 500 mL 291-49

10 mg/L 500 mL 359-49

Nitrate 1 mg/L 500 mL 2046-49

10 mg/L 500 mL 307-49

100 mg/L 500 mL 1947-49

Potassium 10 mg/L 500 mL 23518-49

100 mg/L 500 mL 23517-49

Sodium 100 mg/L 1 mL 23181-53

1000 mg/L 500 mL 14749-49

28

The Sometimes Maddening Science of pH Measurementby Richard Presley, Analytical Chemist, Hach Company

For analysts not having the best of time making friends with elec-trochemistry, this article explores some of the inherent difficultiesposed by pH measurement and how they can be overcome withnew sension™ meters and probes from Hach.

Anyone familiar with pH measurement knows that electrochemistry(when everything is working properly) is the most accurate meansof determining pH. It can also be the most problematic due to avariety of error sources. Errors can range from residual reference-junction potentials and bad buffers to inaccurate temperaturemeasurement and imprecise calibration software. Other potentialsources for undetected error include high electrode impedance,induced voltages from RF interference, improperly designed signalstabilization criteria, sample contamination, stirring effect, and sodium error.

The problem of contamination and residual reference-junction potential The reference junction acts as an electrically conductive bridgebetween the reference electrolyte and the sample to be measured.This junction must be designed to allow free movement of electrons. It must also isolate the reference electrolyte from thesample, ideally allowing only a small amount of diffusion of the reference electrolyte into the sample and no flow of sample into the reference electrolyte.

Reference junctions made of porous materials can produce signifi-cant error by absorbing the sample and eventually clogging. Evenmore frustrating is the fact that the junction potential changesaccording to sample characteristics, contributing uncertainty to calibration procedures and sample readings. ‘Free-flowing’ sleeves ofannular-ring configuration (either an epoxy cone, or glass-on-glassseam) typically allow a higher rate of electrolyte diffusion into thesample than porous materials and tend to dump electrolyte in anuncontrolled manner when manually refreshed.

The new sension Platinum pH probe from Hach, featuring a 0.04-inch diameter capillary tube and a medium viscosity gel electrolyte,maintains excellent electrical conductivity while restricting the flowof electrolyte into the sample. The probe allows virtually no diffu-sion of sample into the reference cell and eliminates contaminationof the reference electrolyte itself. The sension junction is renew-able at the click of a button, dispensing a precise, 6 µL amount ofelectrolyte into the sample.

How inaccurate buffers can produce inaccurate resultsBuffers are not always the stable entities they are cracked up to be.Their pH value changes as a function of temperature. Basic bufferssoak up CO2 from the atmosphere and become more acidic overtime. Additionally, volume loss through evaporation also affects pH.

Buffers formulated to NIST standards are well characterized, whichmeans that the pH temperature profile has been well documented.There are other pH buffer standards out there, but their pH depend-ence on temperature is not nearly as well characterized as the NISTbuffers. Meter software inside Hach’s new sension series ‘knows’what a NIST standard buffer pH value is over a wide temperaturerange. That is why Hach designs meters to recognize NIST buffers,and why the solutions and premeasured buffer powders sold byHach, which can be easily and freshly prepared for each calibration,strictly follow NIST formulations.

A word of caution: Not all buffers follow NIST formularies. Abuffer listed as ‘NIST traceable’ merely means that its pH, at thetemperature tested (usually 25ºC), is the same as that of an NISTbuffer at the same temperature. It does not necessarily mean thatthe buffer has the same formulary or well-known pH values over a wide temperature range.

The challenge of time and temperature Let’s face it. You can’t wait all day for everything to come to thesame temperature. When your buffers are a different temperaturethan your sample, you expect your meter to adjust the calibrationslope accordingly. In addition to the non-linear relationship ofbuffer pH values with temperature (a four constant third-orderpolynomial describes the relationship very well), there exists a linearrelationship between electrode slope and temperature, from theNernst equation: sension meters from Hach make adjustments forboth the linear and non-linear temperature effects during calibration.During the sample measurement, the electrode slope is adjusted tothe temperature of the solution so that the proper slope is calculated,producing an accurate reading regardless of calibration standard orsample temperature.

What if the temperature sensor is slow to respond or in error? InHach’s new Platinum Series electrodes, the temperature sensor hasbeen designed to respond quickly to changes in temperature. Also,the reference element is in close proximity to the sample so that allthe elements of the probe – the reference element, the pH bulb,and sample – come into thermal equilibrium quickly.

The impact of electrical “noise” on high-impedance bulbs Glass is a material with high electrical resistance. pH bulbs haveresistances measured in megOhms. As the resistance of the glassincreases, electrical noise present in the environment becomes moreof a problem, as the electrode cable acts like a radio antenna and yourpH meter picks up these stray electrical fields in much the same wayas your FM radio picks up radio waves and static. Hach Companysubjects its electrochemical testing products to thorough compliancetesting, so the consumer can be confident that the published specifica-tions are met, even when using these high impedance pH electrodes.

29

The shielded coaxial cable used by Hach prevents interference frommost electrical fields. Even so, at certain frequencies (such as highgain signals of three volts per meter in specific regions in the MHzrange-far outside the bands reserved for cell phones, FM radio, andtelevision) the meter may pick up these electrical fields, causing ashift of 0.04 pH units at most. (Use of the ferrite bead on the Hachelectrode cable completely eliminates this extremely rare problem.)In other meters tested by Hach Company during compliancereview, such induced currents completely swamped out the normalfunctions of the meters.

The challenge of time and stabilizationMany analysts grow impatient during the time it takes for pH readings to stabilize. But what if you could toggle from pH to mVmode at the push of a key and monitor drift and noise yourself?Even better, what if you could set your meter to stabilize at theexact moment it achieves 0.0 pH resolution, which happens morequickly than 0.00 or 0.000 pH resolution?

New sension meters from Hach not only allow you to toggle tomV and observe the electrode output more directly, but also to setthe stabilization criteria to match the pH resolution you require.To achieve a higher resolution like 0.01 pH, the stabilization criteriacan be adjusted to that higher level of certainty. It takes more timeto stabilize, but when it does settle in, you can be certain of yourreading. For those who have time and require the utmost accuracy,a 0.001 resolution can be selected as well.

The problem of sample contamination and carry-over Even when analysts practice utmost care in washing, rinsing, dryingand storing samples, strict protocols are not always practicable.Samples can be compromised by carry-over from previous samples,even when laboratory glassware is dedicated to various standards andtypes of sample and containers are rinsed well with DI water andaliquots of sample before critical measurements are made.

When sample carry-over takes place within the junction of porous-junction electrodes, there is little that can be done about it. Thiscan bedevil a day’s work, especially if the instrument has alreadybeen calibrated and the water being tested has very low conductivityand thus little buffer capacity. In this case, carry-over in the junctioncan have a significant effect. Hach’s Platinum pH electrode, with itspatented reference junction, totally eliminates this problem. Withjust a few clicks of the electrolyte dispensing button and an eletroderinse, there is no risk of carry-over or a change in junction potentialsinterfering with careful work.

How stirring can speed response – and compromise qualityWhile stirring the sample may initially speed up response, it can bea source of trouble in pH measurement. For one thing, stirring canadversely affect any junction potential that may exist. In tests con-ducted by Hach Company, this effect was frequently noted inporous junctions and was often present in annular-ring sleeve typejunctions as well. The Hach-patented reference junction presentedthe smallest stirring noise and was an order of magnitude smallerthan other comparably priced electrodes.

In addition to the problem of potential shifts and noise, stirring may also cause any volatile components present to evaporate fromthe sample. An agitated surface also causes the sample to more readily take up CO2 from the atmosphere. All of these factors lead to false readings.

The sodium ion dilemmaThe presence of the sodium ion is the greatest source of error inbasic solutions typically above pH 12 or 13, though sometimesobservable as low as pH 10. Because the pH bulb does not easilydiscriminate between the sodium ion and the hydrogen ion at theseelevated pH values, the meter can indicate a reading which is lowerthan the actual pH in the presence of sodium ions (falsely moreacidic). It is important that electrode manufacturers accurately characterize this sodium – or alkaline – error in their pH glass sothat reliable readings can be calculated for users who routinelymeasure highly caustic solutions with a known sodium content.

The only reliable way this can be done is by comparing the bulbresponse with the response of a Standard Hydrogen Electrode.(Anyone who has used a Standard Hydrogen Electrode can easilyappreciate how wonderful it is that pH glass bulbs were invented to measure pH!) Hach Company has taken the time to carefullycharacterize the sodium error and working ranges of their electrodes,providing differing types of glass formularies to suit unique applica-tions – from fast response in cold, near neutral solutions with lowionic strength to caustic solutions where very low sodium error isguaranteed.

Hach’s published graphs and carefully worded pro-cedures help the analyst correct for sodium error.So, despite the many difficulties that can plague electrochemicalmeasurement – from inaccurate temperature measurement to samplecontamination – it pays to understand the underlying causes, employthe best possible laboratory technique, and select instrumentationand procedures like the new sension meters and electrodes fromHach that have been specially developed to minimize, if not eliminate, such problems.

ISE Electrodes and Accessories

30

Ion-Selective Description Electrode Range Slope TemperatureElectrode Type Range

Ammonia Features replaceable, pre-formed ammonia membrane modules Gas sensing 0.067 to 17,000 mg/L -58 (±3) 0 to 50°CCombination for accurate, economical, and convenient testing. For monitoring as NH3 mV/decade

very dirty samples, optional Air Gap Assembly (see contents of 0.05 to 14,000 mg/L51927 complete analysis package) extends membrane life and may as NH3

-Nimprove low-level measurements. pH range: > 11

Calcium Replaceable membrane half-cell electrode, complete with two PVC 0.02 to 40,100 mg/L -58 (±3) 0 to 40°CHalf-Cell membrane modules, provides reproducible calcium results. Membrane (5 x 10–7 to 1.0 M) as Ca2+ mV/decade

0.05 to 100,000 mg/L50240 as CaCO3.

Sample pH range: 2.5 to 11

Chloride For dependable measurement of free chloride ions in all aqueous Solid State 0.35 to 35,000 mg/L -58 (±3) 10 to 100°CCombination samples, this solid state combination electrode features a silver (1 x 105 to 1.0 M) mV/decade

chloride pellet sensing element and a refillable sleeve type Sample pH range: 2 to 1250255 reference junction.

Cyanide/ Solid-state combination electrode for either cyanide or iodide Solid State Cyanide: Cyanide: 0 to 80°CIodide measurement with pelleted sensing element and refillable 0.2 to 260 mg/L -57 (±3)Combination sleeve-type reference junction. (8 x 10-6 to 102 M) mV/decade

Sample pH range: 11 to 1450260

Iodide: Iodide:0.005 to 27,000 mg/L -59 (±3) (5 x 10–8 to 2 x 10-1 M) mV/decadeSample pH range: 2 to 10 `

Fluoride Features lanthanum fluoride crystal sensing element with refillable Crystal 0.02 mg/L to saturated -58 (±3) 0 to 80°CCombination sleeve-type junction. Membrane (1 x 10–6 M to saturated) mV/decade

Sample pH range: 5 to 950265

Fluoride Features lanthanum fluoride crystal sensing element molded into Crystal 0.02 mg/L to saturated -58 (±3) 0 to 80°CHalf-Cell a replaceable sensing module. Used with reference electrode Membrane (1 x 10–6 to saturated) mV/decade

such as Hach Model 50220. Sample pH range: 5 to 944500

Nitrate Ideal for measuring nitrate in foods, fertilizers, drinking water, PVC 0.5 mg/L (3.5 x 10–6 N) -58 (±3) 10 to 30°CCombination ground water, soils, and plant tissues, this internal, double-junction Membrane to 14,000 mg/L (1 N) mV/decade

reference system features replaceable membrane modules and NO3--N as N in the linear

51920 convenient refillable filling solution. Sample pH range: 3 to 11 range (>3 mg/L Na)

31

Connectors Dimensions Interferences Calibration Electrode Only Complete ConvenientStandards Analysis Package

BNC Connector 149 x 12 mm Volatile Amines 153-49 51927-00 23487-00 Ammonia Analysis Package (Combination)(6 x 0.5") (10 mg/L) Ammonia Combination (Includes electrode and following items, also available separately)

24065-49 Electrode with three ammonia 50287-05 Electrode Filling Solution, 60 mL, pk/5(100 mg/L) membrane modules, electrode 50251-00 Replacement Membranes, pk/3

filling solution, and manual. 153-49 Ammonia Nitrogen Standard, 10 mg/L, 500 mL24065-49 Ammonia Nitrogen Standard, 100 mg/L, 500 mL

50253-00 44471-69 Ammonia ISA Powder Pillows, pk/100Air Gap Assembly 25412-59 Electrode Storage Solution, 50 mLrecommended. Sold separately 1080-41 Beaker, 50 mL

50250-88 Manual

BNC Connector 135 x 12 mm Pb2–, Hg2+, H–, 23054-49 50240-00 23485-00 Calcium Analysis Package (Combination)(5.4 x 0.5") Sr2+, Fe2+, Cu2+, (10 mg/L) Calcium Half-Cell Electrode (Includes electrode and following items, also available separately)

high levels of 44576-49 with two membrane modules, 50280-05 Electrode Filling Solution, 60 mL, pk/5Na+,HJ4+, K–, (100 mg/L) electrode filling solution, 50241-00 Replacement Membrane Module, pk/1Tris+,Li+, Ba2+, 22403-49 and manual. 44576-49 Calcium Standard Solution, 100 mg/L, 500 mLZn2+, Mg2+ (1000 mg/L) 22403-49 Calcium Standard Solution, 1000 mg/L, 500 mL

50292-49 Calcium ISA Solution, 475 mL50220-00 Single Junction Electrode Package1080-41 Beaker, 50 mL50240-88 Manual

BNC Connector 139 x 12 mm NO2, Br –, I–, CN– 23708-53 50255-00 23484-00 Chloride Analysis Package (Combination)(5.5 x 0.5") S2–, S2O3 (100 mg/L) Chloride Electrode with (Includes electrode and following items, also available separately)

183-49 electrode filling solution 50284-05 Electrode Filling Solution, 60 mL, pk/5(1000 mg/L) and manual. 183-49 Chloride Standard Solution, 1000 mg/L, 500 mL

23708-53 Chloride Standard Solution, 100 mg/L, 1000 mL23180-69 Chloride ISA Powder Pillows, pk/1001080-41 Beaker, 50 mL50255-88 Manual

BNC Connector 110 x 12 mm Cyanide: 23291-42 50260-00 23486-00 Cyanide Analysis Package (Combination)(4.4 x 0.5") Cl–, Br –, I–, SCN– (500 mg/L Cyanide/Iodide Combination 23486-01 Iodide Analysis Package (Combination)

iodide) Electrode with electrode filling (Includes electrode and following items, also available separately)Iodide: solution and manual. 50284-05 Electrode Filling Solution, 60 mL, pk/5 (CN-,I)Br –, Cl–, CN– 767-14 Potassium Cyanide, 125 g (CN-)

167-01 Potassium Iodide 454 g (I)44412-69 Cyanide ISA Powder Pillows, pk/100 (CN-)44414-69 Potassium ISA Powder Pillows, pk/100 (I)2180-49 Sodium Hydroxide Solution 50%, 500 mL (CN-)2450-53 Sodium Hydroxide 5.0N, 1L (I)27648-00 Poison Pack, 1 lb. Solid (CN-)1080-41 Beaker, 50 mL (CN-,I)50260-88 Manual (CN-,I)

BNC Connector 110 x 12 mm OH– 291-49 50265-00 50269-00 Fluoride Analysis Package (Combination)(4.4 x 0.5") 1 mg/L Fluoride Combination (Includes electrode and following items, also available separately)

359-49 Electrode with electrode filling 50281-05 Electrode Filling Solution, 60 mL, pk/510 mg/L solution and manual. 291-49 Fluoride Standard Solution, 1.0 mg/L, 500 mL

359-49 Fluoride Standard Solution, 10 mg/L 500 mL2589-99 Fluoride ISA Powder Pillows, pk/1001080-41 Beaker, 50 mL50265-88 Manual

BNC Connector 110 x 12 mm OH– 291-49 44500-71 13034-01 Fluoride Analysis Package (Half-Cell)(4.4 x 0.5") 1 mg/L Fluoride Half-Cell Electrode (Includes electrode and following items, also available separately)

359-49 with electrode filling solution, 44501-26 Electrode Filling Solution, 50 mL, pk/510 mg/L replacement membrane 291-49 Fluoride Standard Solution, 1.0 mg/L, 500 mL

module, and manual. 359-49 Fluoride Standard Solution, 10 mg/L 500 mL2589-99 Fluoride ISA Powder Pillows, pk/10050220-00 Single Junction Reference Electrode Package1080-41 Beaker, 50 mL44500-88 Manual

BNC Connector 244 x 12.7 mm ClO4–, I–, Br–, 2046-49 51920-00 23488-00 Nitrate Analysis Package (Combination)

(9.6 x 0.5") NO2–, Cl–, (1 mg/L) Nitrate Platinum Series (Includes electrode and following items, also available separately)

HCO3–, CO3

2– 307-49 Combination Electrode 25971-02 Ammonium Sulfate Reference Cartridges, pk/2(10 mg/L) with two electrolyte cartridges, 44569-26 Nitrate Internal Filling Solution, 50 mL1947-49 six nitrate membrane modules, 46133-00 Replacement Membrane Module, pk/6(100 mg/L) fill solution and manual. 307-49 Nitrate Nitrogen Standard, 10 mg/L, 500 mL

1947-49 Nitrate Nitrogen Standard, 100 mg/L, 500 mL44563-69 Nitrate ISA Powder Pillows, pk/1001080-41 Beaker, 50 mL51920-88 Manual

32

Ion-Selective Description Electrode Range Slope TemperatureElectrode Type Range

ORP A good performer in difficult samples where redox Platinum Wire mV range of meter used N/A 0 to 80°Cmeasurements are commonly made, this refillable

50230 electrode features a sleeve type reference junction that is easy to clean.

ORP A good performer in dirtier, more difficult samples where redox 51937 mV range of meter used N/A 0 to 80°Cmeasurements are commonly made. This platinum-type electrode features Platinum Wire

51937 a reference junction that resists clogging and is easy to clean.51939

51939 mV range of meter used N/A 0 to 80°CPlatinum Wire

Potassium Half Cell This half-cell electrode features a replaceable membrane PVC Membrane 0.04 to 39,000 mg/L +57 (±3) 0 to 40°Cand is used in conjunction with a reference electrode (1 x 10-6 to 1.0 M as K) mV/decade

50245 (Hach Model 50225). Electrode includes two membrane modules. pH range: 2 to 12

Sodium Utilizes a unique, sodium-sensing glass membrane features a selectivity Glass Membrane 0.002 mg/L (107 M) +58 (±3) Continuous use:Combination ratio unequaled in the industry. Minimal sample preparation required. to saturated solution mV/decade 0 to 50°C;51925 Provides electrode resistance of <1400 megohms @30°C. (Sample pH can range in the linear Intermittent use:

from 4 to 14) range 0 to 80°C(>2 mg/L Na)

Single Junction This refillable Ag/AgCl reference electrode features a sleeve type Solid State N/A N/A 10 to 100°CReference Elecctrode reference junction and offers high sensitivity and easy cleaning. (using 50281-05

For use with applicable half-cells. Filling Solution)50220

-5 to 100°C(using 50280-05Filling Solution)

Double Junction This refillable Ag/AgCl reference electrode features a sleeve-type Solid State N/A N/A 0 to 100°CReference Electrode reference junction and offers high sensitivity and easy cleaning.

Reference element is further protected from contamination by an50225 internal refillable inner chamber separated from the sample by

a refillable outer chamber. For use with applicable half cells.

Temperature Probe Temperature probe features robust, stainless steel body for fast, Thermistor N/A N/A 0 to 80°C51980 accurate, temperature-compensated data. For use with

applicable meters.

Dissolved Oxygen Probe Probe features temperature sensor and screw-on membrane Clark-type 0 to 20 mg/L or N/A 0 to 50°Ccap for easy replacement. Now available in three cable lengths polarigraphic 0 to 200% saturation

51970 (1 m, 3 m, and 15 m) for boat or distance measuring.

Conductivity Probe With improved temperature response and new four-wire design, Epoxy 0.1 µS-200 mS N/A -10 to 110°CHach’s new Conductivity Probe covers the full range of

51975 measurements in most applications.0.5 (cm-1) cell constant

33

Connectors Dimensions Interferences Calibration Electrode Only Complete ConvenientStandards Analysis Package

BNC Connector 135 x 12 mm N/A 26125-20 50230-00 26125-20 Lights Solution ORP Standard, pk/20 ampules5-pin Connector (5.4 x 0.5") Lights ORP Combination Electrodeavailable Solution with ready-to-use filling solution

and manual.

5-pin Connector Diameter: N/A26125-20 51937-00 160.00 26125-20 Lights Solution ORP Standard, pk/20 ampules12.7 mm (0.50") Lights ORP Combination 25469-02 Reference Electrolyte Gel Cartridge, pk/2Total Length: Solution Electrode with ready-to-use241 mm (9.5") filling solution and a manual.

BNC Connector Diameter: N/A26125-20 51937-00 160.00 26125-20 Lights Solution ORP Standard, pk/20 ampules12.7 mm (0.50") Lights ORP Combination 25469-02 Reference Electrolyte Gel Cartridge, pk/2Total Length: Solution Electrode with ready-to-use241 mm (9.5") filling solution and a manual.

BNC Connector 135 x 12 mm Cs+, NH4+, TI–, 23518-49 50245-00 23483-00 Potassium Analysis Package (Half-Cell)(5.4 x 0.5") H+, Ag+, Tris, (10 mg/L) Potassium Half-Cell (Includes electrode and following items, also available separately)

Li+, Na+ 23517-49 Electrode with two membrane 50288-05 Electrode Filling Solution, 60 mL, pk/5(100 mg/L) modules, electrode filling solution 50246-00 Replacement Membrane Module, pk/1

and manual. 23518-49 Potassium Standard, 10 mg/L, 500 mL23517-49 Potassium Standard, 100 mg/L, 500 mL44515-69 Potassium ISA Powder Pillows, pk/10050225-00 Double Junction Reference Electrode Package1080-41 Beaker, 50 mL50245-88 Manual

BNC Connector 240 x 12 mm Ag+, H+, K+, NH4+ 23181-53 51925-00 23481-00 Sodium Analysis Package (Combination)(9.4 x 0.5") (100 mg/L) Sodium Platinum Series (Includes electrode and following items, also available separately)

14749-49 Combination Electrode 25958-02 Ammonium Chloride Reference Cartridge (pk/2)(1000 mg/L) with two electrolyte cartridges 23181-53 Sodium Standard, 100 mg/L, 1000 mL

and manual 14749-49 Sodium Standard, 1000 mg/L, 500 mL44515-69 Sodium ISA Powder Pillows, pk/100182-01 Sodium Chloride, ACS, 454 g50281-05 Filling Solution, 60 mL, pk/51080-41 Beaker, 50 mL51925-88 Manual

Standard 110 x 12 mm 50220-00 50281-05 Filling Solution, 60 mL, pk/5 (matches the characteristics of aPin-Tip (4.4 x 0.5") Single Junction Reference KCl-saturated calomel electrode)

Electrode with pin-tip connector, 50280-05 Potassium Chloride Filling Solution, 60 mL, pk/5ready-to-use bottle of filling (optional for use in some applications)solution, and manual.

Standard 110 x 12 mm 50225-00 50282-05 Potassium Nitrate Inner Filling Solution, 60 mL, pk/5Pin-Tip (4.4 x 0.5") Double Junction Electrode (for use with nitrate and potassium half cells)

with pin tip connector, 50283-05 Ammonium Sulfate (0.04) Outer Filling Solution, 60 mL, pk/5ready-to-use bottle of inner (for use with nitrate half cell)and outer chamber filling 50288-05 Sodium Chloride Outer Filling Solution, 60 mL, pk/5solution, and manual. (for use with potassium half cell)

5-pin 120 x 6 mm 51980-00DIN (4.8 x 0.25") Temperature Probe (sensionBNC and 3.5 mm Meter) with 5-pin connectorphone plug 51980-22

Temperature Probe (EC Meter)with DIN Connector51980-11Temperature Probe (Hach One Meter) with 3.5 mm phone connector

5-pin Circular 149 x 12.1 mm 51970-00 (1m Cable) (Accessories available separately)(6 x 0.475") 51970-03 (3m Cable) 51971-00 BOD Accessories Kit, with funnel and spacer

51970-15 (15m Cable) for D.O. Probe Model 51970-0051968-00 D.O. Probe Service Kit, with two membranes,

Dissolved Oxygen electrolyte filling solution and clothProbe with 5-Pin connector 51973-00 Membranes for D.O. Probe, pk/2

27591-26 Electrolyte Filling Solution

5-pin Circular 120 x 15 mm See right 51975-00 (Standards available separately)(4.8 x 0.6") column Conductivity Probe 23075-42 180 µS/cm, 90 mg/L TDS, 100 mL

with 5-Pin connector 14400-42 1000 µS/cm, 500 mg/L TDS, 100 mL2105-42 1990 µS/cm, 1995 mg/L TDS, 100 mL23074-42 18,000 µS/cm, 9000 mg/L TDS, 100 mL27143-49 53,000 µS/cm, 35.0 ppt salinity, 500 mL

Electrode Washer

Stop CO2 interference with the LIS Sample Chamber.Low ionic strength solutions have very low buffer capacity and readily absorbcarbon dioxide from the air. This means you need to handle the sample withextreme care and refresh calibration buffers often – or run the risk of fluctuatingpH readings.

Hach has developed an innovative means of reducing the potential for CO2

interference with pH measurement. Ideal for grab-sampling environmentalwater, plug-flow analysis of deionized water, and conductivity, pH and DO testing of low-ionic-strength samples, the new LIS Sample Chamber will makeyour life easier. Simply slide the electrode into the seal of a tight jar lid andextend it into the 500, mL jar holding your sample. This chamber isolates sample from the atmosphere, preventing absorption of CO2 and preserving theintegrity of your pH results. Alternately, the chamber can be connected to yoursample stream with supplied hoses, allowing pH measurement with no exposureto the atmosphere.Catalog No. 51899-00.

Simplify electrode maintenance.The electrode washer provides a safe and convenient way to clean up and carefor your electrode without scratching or damaging. Simply hang the electrodein the spray chamber and squeeze the attached 500-mL reservoir of distilledwater. The rinse water drains through a section of vinyl tubing attached to the chamber.Catalog No. 27047-00.

Also Available:For handling electrodes

20894-00 Electrode Rack

20895-00 Electrode Support Clamp

26157-00 Electrode Holder, Flexible Arm

20893-00 Electrode Holder, Universal

45315-00 Extra Stir Bar

pH Electrodes and Accessories

Low-Ionic-Strength (LIS) Sample Chamber

34

HachLink™ Software

Download field results.Activate your portable meter’s downloading capability with aninnovative, skid-resistant docking station. This device enablesyour meter to send data to a printer or computer, and when connected to an AC source, eliminates the need for batteries.Available in 115V and 220V for sension2, sension5,sension6, and sension156 meters.Catalog No. 51875-01 (115V); 51875-02 (220V).

Hold up to three electrodes at once.Hold up to three electrodes in this handy electrode stand,designed to accommodate your laboratory testing needs.Available with an optional, built-in electromagnetic stirrer(100 to 1000 rpm), which stirs sample without heat, theElectrode Stand is ideal for ISE measurements that requirecontinuous stirring for optimal performance. Constructed of high-impact plastics.Catalog No. 45300-00 (non-stirrer).

45300-01 (with stirrer) 110V45300-02 (with stirrer) 220V

Transport easily to the field.Custom-built, soft-sided carrying case transports everythingyou need for pH, ISE, conductivity, and dissolved oxygenanalysis to the testing site. Hard sided carrying case also available.Catalog No. 51904-00.

Hard-sided caseCatalog No. 51903-00.

sension156 Hard-sided case Catalog No. 51917-00.

Simplify data management.Need to collect and store data for later analysis? At the push of a button, you can convert your data – without a glitch – from any sension Meter (or other Hach instrument) to yourchoice of text file or spreadsheet format, including Excel.HachLink™ Software uses Microsoft® Windows® compatible software to transfer data to your computer by pressing theprint key or uploading stored data.

To install and run HachLink™ Software, your computer and software must meet the following requirements:

• 8 megabytes RAM

• Hard disk with 10 megabytes free space

• Requires Windows 95, 98 or NT

Catalog No. 49665-00.

Soft-sided carrying case

Electrode stands come with andwithout stirrers.

Docking Station

35

Buy with confidence.Ultra-reliable, Hach-manufactured meters

• Confident pH, pH/ISE, conductivity and dissolved oxygen testing

• Three-year guarantee

• Datalogging capabilities

• IP67-rated waterproof seal (portable models)

Robust Platinum-Series Electrodes

• Exceptional precision and accuracy

• Faster-than-ever response

• Smooth, consistent dispenser action

• Easy-to-follow manuals with every model

All backed by the best technical support in the industry.Try them today risk-free! Call 800-227-4224. (Outside the U.S., call 970-669-3050.)

For current price information, technical support and ordering assistance, contact the Hach office or distributor serving your area.

Your distributor is:

sensionTM Electrochemical Products

In the United States, contact:

HACH COMPANYP.O. Box 389Loveland, Colorado 80539-0389U.S.A.Telephone: 800-227-4224Fax: 970-669-2932E-mail: [email protected]://www.hach.com

All other inquiries, contact:

HACH COMPANYP.O. Box 389Loveland, Colorado 80539-0389U.S.A.Telephone: 970-669-3050Fax: 970-461-3939E-mail: [email protected]://www.hach.com

Lit. No. 4360I110 Printed in U.S.A.© Hach Company, 2001. All rights reserved.

hach540 br reprintv4 - mag srlmagsrl.com.ar/imagenes/hach/electroquimicos/4360se... · sension1...

Documents