Vortex Flow Meter

The vortex shedding flow meter, commonly known as vortex flow meter. a non stream  lined obstruction known as a shedder bar or buff body is placed across the middle of the flow stream.  As the fluid stream in the pipe hits this obstacle it must separate to pass around it with fluid layers nearer the surface of the moving slower than those further away. As a result when these fluid layers recombine after passing the bar, vortices are generated and shed alternately from either side of shedder bar.

The frequency of generated vortices is usually detected using sensors integrated both sides of the shedder bar. Pressure and capacitance type sensors are commonly used.