Detailed Product Description Independent combustible gas detector AEC series, is a kind of suitable ... monitoring sensor failure, the aging, poisoning, avoid misstatement, omission.· Can independent alarm, also can with the security system, the village intelligence ... · Detect principle:semiconductor· Detected gasNG,LPG,MG· alarm concentration:NG:4%LEL±3%LELLPG:7%LEL±3%LELMG: 500ppm±125ppm H2 ...