... the begining our company named as Qinfeng Flow meter.we are the professional manufacturer of flowmeters, ... LZJ(-F)glass tube flow meter,LZB-W(B)micro type glass tube flow meters,G.R.F10 ... ,adopt to panel installation,equip with adjustable flow valve.Light structure,good figure,easy installation ... Drawing: rotameter with alarm,air flow rotameter,glass tube variable area flow meters,flow meters for liquid