... 5. Excellent Smoke Resistant Performance CA-386D Natural Gas Leak Detector: Features: Detection Gas: manufactured gas (hydrogen), natural gas, liquefied petroleum gas (LGP)Excellent sensor, stable and long-life ... :CA-386DAlarm Concentration:Hydrogen:125~750*10-6,Natural Gas:1-25%LEL,Liquefied Petroleum Gas:1~25%LELPower Supply:AC220V/50HZPower Monitoring ...