[Vortex Flowmeter VY Series] What is a vortex flowmeter?

It converts pressure changes caused by the Karman vortex generated by a vortex shedder bar into an electrical signal. The vortex flowmeter uses that electrical signal to convert the Karman vortex into a flow rate and output it.

Please refer to the article "Basics of Vortex Flowmeters: Measurement Principle and Measured Fluids".