our infrared thermopile sensors and thermopile arrays are used for a variety of applications, which we divide into two different categories. the first category comprises non-contact temperature measurements and the second one gas detection and gas concentration measurements. vacuum sensing applications do not use thermopiles and are addressed by our non-thermopile mems sensors.
out thermopile sensors can be used to perform gas concentration measurements based beers law and the nondispersive infrared (ndir) gas detection principle. simply stated, measuring the absorption of infrared radiation at a specific wavelength allows the determination of the concentration of a specific gas. all that is required is an infrared light source and one thermopile, but two single or one dual thermopile sensor are often used to improve accuracy by eliminating drift over time of the infrared source emission. due to their small size and low thermal mass, ndir gas detection with thermopile sensors can be very fast and require only little volume.