... ,at the begining our company named as Qinfeng Flow meter.we are the professional manufacturer of flowmeters,thermometers,liquid level meters,transmitters ... contain of LZB/LZJ(-F)glass tube flow meter,LZB-W(B)micro type glass tube flow meters,G.R.F10/20/30 ... .16~1.6m3/h5~50m3/hStructure Drawing: rotameter with alarm,air flow rotameter,glass tube variable area flow meters,flow meters for liquid