... Smoke Resistant Performance CA-386D-C Flammable Gas Leak Detector Features: Detection Gas: manufactured gas (hydrogen), natural gas, liquefied petroleum gas (LGP)Excellent sensor, stable and long ... -CAlarm Concentration:Hydrogen:125~750*10-6,Natural Gas:1-25%LEL,Liquefied Petroleum Gas:1~25%LELPower Supply:DC12V-DC24VPower Monitoring ...