1) High quanlity, High accuracy. 2) Professional domestic gas meter supplier 3) For Gas,LPG,CH4 and Other Gas and Air. ... life6 YearsExtended Functions:1. Supporting anti-reverse mechanism is available. In the case of reverse connection, the gas meter will stop ... Intelligent & technology Co.,Ltd is the only commercial gas meter supplier in Shanghai Expo 2010, we can provide OEM service, which means ...