... 14 years experience. the product have goode quanlity intelligent gas flow meter QUANZHOU RIXIN FLOW METER AND ... in Chian. Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow meter, ... ,316(can offer according to customer's need)Power supply:Built-in 3.6N li batter,(lifetime ... 1~2 years),external power supply of 24VDCOutput forms:4-20mA;pulse,0 ...