... in Refineries, Chemical plant, LPG station, Gas Boiler, and Spray-Paints etc where gas leakage easily, It can ... the gas concentration in Air to electronic signal output420mA and transmit with three-core cable, people could check the ... sensor Target gasNatural gas (CH4), LPGButanepropaneCoal gasH2Pentane, AlkyneAlkene etc, and liquid steam such as alcohol, Acetone, Toluene, gasoline; Sample manner ...