Optional Temperature and Pressure Measurement
An optional Pt1000 RTD sensor integrated into the bluff body provides direct measurement of liquid temperature and is transmitted as a resistance signal. Flow is provided as either a digital pulse, 4-20 ma current or as 0–10 VDC based on model selection. A rugged pressure sensor can be attached to any size of instrument with voltage or current output for accurate measurement of liquid pressures up to 174 psi / 1200 kPa.
How It Works
As liquid flows around a bluff body inside the flow channel, swirling vortices are formed and carried downstream at the velocity of the flowing liquid. Alternating localized high- and low-pressure zones characteristic of a vortex stream are detected by a piezoelectric crystal that produces a small pulse each time a vortex passes the sensor element. The number of vortices formed is directly proportional to the linear velocity of the liquid passing through the instrument.