The Vortex flowmeter is an intelligent flowmeter designed and developed using a piezoelectric sensor based on the Karman vortex principle. Mainly used to measure the flow rates of various media such as vapors, gases and liquids. The characteristics of the measuring tube are that there are no moving mechanical parts inside the measuring tube, small pressure loss, large measuring range, the equipment parameters can be stable for a long time so high reliability and less need maintenance.