Gas Detector are of different types which sense different types of gases eg. Nitrogen (N2) gas detector, Oxygen (O2) gas detector, Argon (Ar) gas detector, Carbon Dioxide (CO2) gas detector, Neon (Ne) gas detector, Methane (CH4) gas detector, Helium (He) gas detector, Krypton (Kr) gas detector, Hydrogen (H2) gas detector, Xenon (Xe) gas detector and many more. These gas detector is a part fire detector.