... manufacture with 14 years experience. the product have goode quanlity intelligent gas flow meter QUANZHOU RIXIN FLOW METER AND INSTRUMENT CO ... can trust in Chian. Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow meter,steam flow ... meter etc.B,Flange ,clamp,thread inserted connection etc.C,4~20mA,pulse,0~10V,RS485,HART etc.D,D ...