Series of vortices will be shed alternatively from both sides of the shedder (that is a cylindrical or triangular bar) when it is inserted in the fluids. Under certain conditions, the frequency of shed vortices should be proportional to volume flow rate. Based on this principle, the flow measurement could be carried out through measuring frequency of vortices by means of vortex flow-meters.

Two versions are available: one has a built-in (integral) converter, and the other is used with a remote converter.

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