1.water flow meter,water level meter 2.no movable part,1.0%0.5%0.2%accuracy 3.6~ ... flow meter. It was widely used in fields of gas, natural gas, petroleum industry, chemical engineering, energy industry, ... adopt hang weight method to test the flow meter.Measurement range can be changed by replacing ... shall execute GB/T9115.1~9115.4~2000 series standard. For pipeline type, small diameter flowmeter of ...