Optoelectronics

Thermopile detectors

2nd March 2023
Sheryl Miles
0

LASER COMPONENTS is pleased to represent Dexter Research Centre, specialists in the manufacturing of stable, high quality, high output radiation sensing thermopile detectors with a linear dynamic range from the UV to long wave IR.

Thermopile detectors are passive radiation sensing voltage-generating devices that require no bias or cooling and do not emit any radiation.

Spectral sensitivity is defined by the selection of optical band-pass filters, with dozens of options available. Thermopile output is generally in the micro-Volt to milli-Volt range depending on target size, temperature, and radiance.

Thermopile detectors generate no 1/ƒ or microphonic noise, but only the Johnson noise of their resistance. Additionally, thermopile detectors provide a stable output for DC radiation up to a frequency limited by the time constant. Unlike pyroelectric detectors, no chopper or modulation is required.

Applications are broad and include the following: 

  • hand-held non-contact temperature measurements
  • non-contact temperature measurements in industrial applications and process control
  • infrared radiometry
  • automotive exhaust gas analysis of CO, CO2, & HC
  • medical gas analysis including anaesthetic, incubator CO and CO2, blood alcohol breathalysers
  • fire detection
  • blood glucose monitoring
  • human presence and detection
  • custom sub-assemblies including mechanics and PCB’s

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