European Facility For Airborne Research

Measures up-welling and/or down-welling incident radiation in visible/near infra-red

The Eppley PSP is an instrument for the measurement of radiation in the range approximately between 285 and 2800nm. The official Eppley literature states that the Eppley PSP has a temperature dependence of plusmn;1 % over the ambient temperature range -20°C to 40°C.
The important components of the PIR are the :
-Thermopile: The thermopile of the PSP is designed to be sensitive to shortwave radiation. It is painted black to maximise heating, and has a sensitivity of about 9 µV/Wm-2. The thermopile surface can be considered an ideal black body.
- Transmittance Filter: It is comprised of two optical glass domes above the thermopile. The transmission spectrum is very flat and has a cutoff for wavelengths below 300 nm.
- Thermistors & Temperature Compensation Circuit: - Amplification Circuits