LUGB series of vortex flowmeter is based on the"Karman vortex" principle, the use of piezo electric crystal as a measuring element of the flow measurement instruments for a variety of gas, steam, liquid flow measurement . LUGB series of vortex flowmeter specifications from DN15 to DN600, vortex flowmeter in accordance with the structural characteristics into full-tube vortex flowmeter and plug-in vortex flowmeter. In accordance with the different output signals can be divided into pulse output mode sensor and the standard current output of the transmitter.The instrument has the advantage of wide flow measurement range,high accuracy,simple structure, small pressure loss, no moving parts, etc.It is applied to the measurement of instantaneous flow and total flow of fluid in a closed pipeline.