1.measuring method is the expansion of two different metals 2.Body material:steel plate,cast aluminium alloy Company profile:CHANGZHOU CHENGFENG FLOWMETER CO.,LTD was established in 1979,at the begining our company named as Qinfeng Flow meter.we are the professional manufacturer of flowmeters,thermometers,liquid level meters,transmitters and so on.The main products are contain of LZB/LZJ(-F)glass ...