... ,at the begining our company named as Qinfeng Flow meter.we are the professional manufacturer of flowmeters,thermometers,liquid ... are contain of LZB/LZJ(-F)glass tube flow meter,LZB-W(B)micro type glass tube flow meters, ... C as options2.Conventional DC current,voltage signal and remote transmission manometer,potentiometer,resistance signalDisplay:1.LED singular/ dual digital display2. display range:- ...