Flowmeter And Switch Has No Moving Parts

KOBOLD DVZ Series vortex flowmeters have no moving parts and target applications where reliability and low cost are focal points. The vortex flowmeter senses the flow rate of low-viscosity liquids using the vortex-shedding principle. A small obstruction (bluff body) is placed in the flow path. As fluid flows across the bluff body, small, low-pressure areas (vortices) are created just behind the bluff body.


The position of the vortices alternates to either side of the bluff body in a uniform pattern. The frequency of the vortex shift is directly proportional to flow rate. This shift in the vortices is detected by a very sensitive pressure sensor and is processed as a scaled flow rate signal. The DVZ Series vortex flowmeter has no moving parts and is thus very reliable. It is available with a PPS body and your choice of either nickel-plated brass or 316 stainless steel fittings.

Free Newsletter

Like this article? Subscribe to FierceSensors!

The sensors industry is constantly changing as innovation runs the market’s trends. FierceSensors subscribers rely on our suite of newsletters as their must-read source for the latest news, developments and analysis impacting their world. Register today to get sensors news and updates delivered right to your inbox.


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 KOBOLD DVZ Series vortex flowmeter include pulse frequency, 4-20 mA, adjustable relay, and compact electronics with LED digital flow rate display, 4 to 20 mA output and adjustable transistor switch options. For further insights, take a look at the DVZ Series datasheet and DVZ Series user manual.

Suggested Articles

Plans include combining temperature readings with information related to cough sounds in an app.

Impact of WFH will be short-lived for purchases of PCs and tablets, IDC analyst believes

Critics also bemoan recent FAA decision to allow Boeing to re-certify 737 MAX