Stand-combustible Gas Detector BJ-93D Combustible Gas Detector Detection of gas: methane, carbon monoxide BJ-93D Combustible Gas Detector Output: * DC12V pulse output can drive shut-off valve * Relay contact output BJ-93D Combustible Gas Detector Technical Parameters â??* Detection of gas: methane, carbon monoxide * Detection method: FIGARO semiconductor gas sensor * Alarm concentration: Methane: 1% LEL ~ 25% LEL * Carbon monoxide: 50 x 10^(-6) ~ 300 x 10^(-6) * Power supply: AC220V ± 15% * Power consumption: less than 2W * Temperature: -10 ~ 55 deg C