www.exergen.com1 product overview snakeeye thermal switch
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PRODUCT OVERVIEWPRODUCT OVERVIEW
SnakeEyeThermal Switch
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SnakeEyeSnakeEye
100%Inspection
ofHolt MeltAdhesiveApplied to
Product
Photocell-Like Non-ContactPhotocell-Like Non-ContactThermal InspectionThermal Inspection
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Non Contact Sensors for IR Non Contact Sensors for IR Thermal SwitchingThermal Switching
Detect hot object presence and position
Photocell simplicity Extraordinary thermal
sensitivity Straight view and Side
view models available High speed and low
speed available
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How the Snake Eye WorksHow the Snake Eye Works1. Heat signature created by hot source enters the
field of view and is detected
2. If the positive (cold to hot) rate of change is sufficient for a sufficient length of time (as determined by the sensitivity adjustment), the SnakeEye causes the output to switch
3. For the trailing edge (hot to cold), a second output switch is activated when negative rate of change and time are sufficient
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Principles of the SnakeEyePrinciples of the SnakeEye
time
Field of ViewField of View
Heat SourceHeat Source
InputInput
ThermalThermal
SignatureSignature
OutputOutput
ThermalThermal
SwitchingSwitching
The heat source enters the field-of-view of the SnakeEye and is detected by the sensing system.
If the rate of change is of sufficient magnitude the SnakeEye causes the output to switch.
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SPECIFICATIONSSPECIFICATIONSSENSING RANGE: 0.01” (0.25 mm)
minimum target size or 4F (2C) temperature difference
SENSING SPEED: 5 msec response time, 1500 ft/min. max line speed, 1 ft/min (0.3 m/min) minimum line speed
FIELD OF VIEW: 3:1SIGNAL OUTPUT: 2 solid state switches
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SnakeEye SnakeEye
LengthLine Speed
Gap
Gap/ObjectGap/Object
TemperatureTemperature
DifferenceDifference 5 msec5 msecTrailingTrailing
EdgeEdge
SwitchingSwitching
LeadingLeading
EdgeEdge
SwitchingSwitching
Thermal Switching of Objects WithThermal Switching of Objects With
Less Than 1Less Than 1ooC DifferentialC Differential
Photocell-Like Non-ContactPhotocell-Like Non-ContactThermal SwitchesThermal Switches
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Detecting Presence/Absence Detecting Presence/Absence Hidden Foil Safety SealHidden Foil Safety Seal
Induction HeaterInduction Heater
PharmaceuticalPharmaceutical
BottleBottle
Heat Signature of Heated Foil Through CapHeat Signature of Heated Foil Through Cap
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Snake Eye ApplicationsSnake Eye Applications
Hot melt detection (Beer cartons, diaper lines, cereal boxes, etc.)
Thermal Switching (safety seal lines for aspirin bottles, thermal signatures on heated labels, hot food product on assembly line)
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HHiigghh SSppeeeedd HHoott MMeelltt AAddhheessiivvee DDeetteeccttiioonn
• Seal Sentry Verification System: Controller (left), Junction Box (right), Sensor Assembly (inset).
From Nordson Website
PACKAGING
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HOT MELT DETECTION HOT MELT DETECTION