DVZ Series vortex flowmeters

The DVZ Series flowmeters are compact and inexpensive and can be utilised in all applications for low-viscosity fluids. Since the units operate without any mechanical moving parts, they are practically maintenance free and have distinct advantages compared with units based on the float or rotor principle. In contrast to calorimetric flow measurement, this measurement principle operates without time delays and can thus also be used in time-critical applications.

The vortex flowmeter does not require any moving parts for measurement. A von Kármán vortex path is built into the flowmeter. For this, a sharp-edged object is integrated into the flow channel as a baffle. Vortices are formed at the generator and are displaced from the baffle by the medium flowing past. The displacement frequency of the vortices is directly proportional to the speed of flow and the flow rate. The measurement process is suitable for practically all liquids with a viscosity similar to water — it is independent of the pressure, temperature, specific gravity and electrical conductivity of the medium.

Different variants of the DVZ Series cover measuring ranges up to 100 L/min. The unit can be equipped with a fixed or swivel connection. Depending on the version, a switched output (1A/30 VDC), a frequency output (open collector, PNP or NPN) or an analog output (4-20 mA) are available. Also available are programmable compact electronics that contain a digital display and a switched and analog output.