The PFS-WM WedgeType™ Flow Meter excels where others fail, accurately measuring highly viscous, rough or solids-bearing fluids and slurries, as well as gas or steam. This meter is even ideal for asphalt, tar-sands, or industrial use.

Giving +/- 0.50 % accuracy and +/- 0.20% repeatability while measuring thick abrasive slurries, gas-infused liquids, or steam is a breakthrough feat of engineering, and PFS-WM WedgeType™ Flow Meter excels with these difficult-to-meter fluids. The system is a differential-pressure meter, consisting of a cylinder with a wedge in it, constricting the flow between sensors. It accurately handles relatively low Reynolds numbers, and its discharge coefficient is stable through the operation range; coupled with PFS secondary instrumentation, it provides the most durable, accurate and reliable metering solution for a huge range of media.


  • Accuracy: +/- 0.5% over calibrated range
  • Repeatability: +/- 0.2%
  • Line Fluid Types: Gas or Liquid, including dirty, contaminated or slurry
  • Line size: Range is unlimited, with installations from 0.5” to 24” in service
  • End Arrangement:
    • Flange ends – PFS-WMF
    • Threaded ends – PFS-WMT
    • Weld ends – PFS-WMV
    • Plain, mechanical joint, or other ends available as required
  • Body material: virtually any machineable or wieldable material, including carbon steel, 316 or 304 Stainless steel, hastelloy, PVC (for chlorine), or others on request


20.0 Inch WedgeTypeTM Flow Meter
20.0 Inch WedgeTypeTM Flow Meter
12.0 Inch WedgeTypeTM Flow Meter
12.0 Inch WedgeTypeTM Flow Meter