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Pyroelectric
Return Technical Notes Pyro Specs 1 Pyro Specs 2 Pyro Specs 3 Quad Pyro Air Pressure Switch Flame Detectors

 

Technical Notes
Pyro Specs 1
Pyro Specs 2
Pyro Specs 3
Quad Pyro
Air Pressure Switch
Flame Detectors

Pyroelectric detectors

pyros2.jpg (10653 bytes)

Pyroelectric Infrared Detectors (PIR) convert the changes in incoming infrared light to electric signals. Pyroelectric materials are characterized by having spontaneous electric polarization, which is altered by temperature changes as infrared light illuminates the elements. Since our sensor series uses this effect they can be used at ambient temperature even in the presence of thermal noise. By choosing appropriate IR receiving electrodes, they serve a wide range of applications.


Characteristics

bulletHigh Sensitivity
bulletVersatile selection of IR wavelength filters
bulletRoom temperature operation
bulletLow cost
bulletRobust under severe environmental conditions
bulletStable against ambient temperature and atmospheric changes
bulletStable against electromagnetic interference

Applications

bulletIntrusion sensor
bulletLight control
bulletTemperature measurement
bulletFlame detector
bulletAutomatic door switch
bulletVisitor detector
bulletHome security
bulletLife safety

IR Filters

bulletAR coated silicon (low cost)
bullet7Ám cut-on, long pass, filtered silicon (body detection)
bullet4.3 Ám bandpass filtered quartz (flame detection)
bullet4.5 Ám AR coated silicon (body detection)
bullet5Ám cut-on silicon (body detection)

Relative transmittance of window.

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Last modified: October 25, 2009