Micro-Hybrid manufactures two different models of dual channel thermopile detectors for different gases, the MTS2SENS200 and the MTS2SENS44. With a particularly high detectivity of up to 6.27*10^8 cm√Hz/W, as well as the very high sensitivity of up to 171 V/W, the MTS2SENS200 provides a signal quality comparable to pyroelectric detectors. The optical filter window is specially designed for NDIR gas analysis of the corresponding gases. Storage and operation can be performed between -20 and 85 °C.