... controller: RBK-6000-2,RBK-6000-6 gas alarm controller Detection range :12-15 square, combustible gas catalytic combustion sensor (% LEL), toxic gases ... using electrochemical sensors (ppm, 10ppm). Gas detectors should be installed in the gas leak site, the specific location should be based ... °C or 65 °C place; 5, strong electromagnetic fields. Hydrogen Gas Leakage Alarm