Detectors for Optical Gas Sensors

There are two types of detectors quantum detectors, also known as photodetectors, and thermal detectors, which can be used in optical gas sensors (see Table 14.15). A quantum detector responds to individual photons, which are the quanta of radiation. A thermal detector responds to temperature changes caused by 

Company PerkinElmer IGM l Co. Ltd Raytheon Hamamatsu Soume Data from Nelson (2009) 

14 Materials for Optical, Fiber Optic, and Integrated Optical Sensors 

CB cantilever beam thermopile, MB micro bridge thermopile, M membrane thermopile, C commercial thermopiles, R responsivity, T time constant of response. O specific detectivity Source Data from Graf et al. (2007) 

Pyroelectric materials are an active material in pyroelectric detectors (Norkus et al. 2006 Budzier and Gerlach 2011). Parameters of these materials are listed in Table 14.18. The three most connmonly used pyroelectric materials in such detectors are triglycine sulfate (TGS), lithium tantalate, and ceramic material based on lead zirconate (PZ), including lead zirconate titanate (PZT) (Porte 1987 Izyumskaya et al. 2007). 

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