Combustible gas detectors cannot replace hydrogen detectors. Hydrogen detector is a kind of instrument (H2) specially designed to detect hydrogen concentration. The explosion limit of hydrogen is very low, and it is a colorless and odorless gas, which will cause explosion danger in some specific environments. Hydrogen detector usually has high sensitivity and fast response, so as to find and warn hydrogen leakage in time. Combustible gas detectors usually calibrate and adjust specific combustible gases to ensure accurate measurement of the concentration of specific gases, thus avoiding dangerous situations such as fire and explosion.