Is it possible to work at operation temperatures over 100 C?
Principally this is no problem for the pyroelectric element itself, however care has to be taken when selecting the electronic components like resistor, JFET an OpAmp as these have to meet the increased specification. Additionally the built-in IR filter or window has to be designed for and its mounting technology must be able to guarantee a long term hermetical sealing by buffering mechanical tensions. A combination of both high (>85C) and very low temperatures (<-25C) is difficult. For applications with operating temperatures above 60C always consider the use of detectors with CMOS operational amplifiers instead of JFET because their leakage current is lower.
