... for CH4,Butane and H2 Stable performance with RoHS Combustible Gas Sensor 1. Summary MC203 operate on the catalytic ... resistance of the test element rised when meeting the combustible gas, in the same time, the output voltage of ... natural gas, LPG, coal gas, alkane ect combustible gas, and gasoline, Alcohol, ketone, benzene ect organic solvent;Combustible gas leaking alarm or detectors;Gas concentration ...