DVZ - Vortex Flow Meter and Switch

KOBOLD DVZ inline vortex flow meters for low viscosity liquids feature a long service life and low maintenance as they do not utilize a mechanical means of measurement, where components can break or wear out, and are the perfect solution for applications requiring reliability and low cost.

The DUK is available with a PPS body and your choice of either nickel-plated brass or 316 stainless steel fittings. 

The bluff body is available in either the standard PPS or optional ceramic material, which has excellent long-term wear characteristics even under harsh operating conditions. 

Available outputs for the DVZ include pulse frequency, 4-20 mA, adjustable relay, and compact electronics with LED digital flow rate display, 4-20 mA output and adjustable transistor switch options.

The DVZ senses flow rate using the vortex-shedding principle. A small obstruction, known as a bluff body or shedder-bar, is placed within the flow path. 

As flow occurs past the bluff body, small low-pressure vortices (swirls) are created just behind it. The vortices alternate to either side of the bluff body in a uniform pattern and the frequency of the vortex shift is directly proportional to flow rate. 

A very sensitive pressure sensor is used to detect the shifts and a scaled flow rate signal is produced.