P420 series vortex-shedding flowmeters

P420 series vortex-shedding flowmeters are inexpensive, nonmechanical flowrate transmitters with no moving parts that can stick, bind or become coated when processing corrosive fluids. They meet the requirements of the chemical, water treatment and water desalination industries, and are suitable for corrosives, water, brine and low-viscosity-fluid applications. The instruments feature wetted parts constructed entirely of polyvinyl chloride (PVC). Since these flowmeters have no O-ring seals, they make connections either by solvent-welding PVC pipe into the socket port or through a threaded connection. Electronic output is from a 4–20-mA two-wire transmitter, and the electronics package is encapsulated with a thermosetting compound to make it resistant to shorting, corrosion, leaks, humidity, or condensate formed in conduits or from thermal cycling. They are available in five pipe sizes with maximum flowrates as follows: 0.5 in. (12 gal/min, 45 L/min); 0.75 in. (25 gal/min, 95 L/min); 1.0 in. (50 gal/min, 190 L/min); 1.5 in. (100 gal/min, 380 L/min); and 2.0 in. (200 gal/min, 750 L/min).