The operation of the Universal vortex flow meter is based on the vortex shedding principle. As fluid moves around a body, vortices (eddies) are formed and move downstream. They form alternately, from one side to the other, causing pressure fluctuations.  These are sensed by a piezoelectric crystal in the sensor tube, and are converted to a 4-20 mA or pulse signal. The frequency of the vortices is directly proportional to the flow. This results in extremely accurate and repeatable measurements with no troublesome moving parts.

A compact two-wire transmitter is a conveniently replaceable plug-in electronics module, located in a corrosion-resistant housing.

Unlike stainless steel or paddle wheel designs, the vortex sensor is perfect for aggressive or easily contaminated flow media.  Applications range from corrosive chemicals to ultrapure water. Although pre-calibrated for specific uses, units can be recalibrated in the field. Potentiometers are provided to adjust for zero and span, anywhere from 10 to 100 percent, without increasing the unit’s minimum readable flow or reducing accuracy.

Refer to our technical bulletin titled “Universal Vortex Flowmeters” for additional design information.

Connection: Wafer
Turndown Ratio: 12:1
Accuracy: ±1% of designed full scale, ±1% of rate with Vorsite 2000 remote indicator/controller
Repeatability: ±0.25% actual flow
Output Signal: Linear 4-20 mA (pulse options)
Power Supply: 13 to 30 Vdc
CSA Certified: CSA-LR63883
Weatherproof: NEMA-4X
Maximum Overrange:
   125% for 1/2 hour
    No overrange for Hi-Temp units
Response Time: 1.5 sec, first order; a 7.5 sec delay until
   true flow rate is indicated