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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