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WPS supplies a broad line of flow meters for readout, transmission and control of fluid rate for most industrial process applications.

For low-capacity, low pressure applications we offer glass tube purge meters with stainless steel frames. Purge meters are specifically designed for purging instrument cases and control lines, and are readily adapted to liquid-level indication, sampling, liquid specific gravity determination and similar applications. For low flow, higher pressure applications armored purge meters are available. For high volume flows glass-tube and metal tube meters are available in a variety of sizes and configurations for metering both air and liquid.

Variable Area Flow Meters

The WPS Varea-Meter® range

Brochure for Purge, Flow and Varea-Meter

Meter Type


Max Operating Pressure PSI (bar)

Max Operating Temperature Deg. F(C)

Max Capacity at STP (water/air)

Glass Tube Purge Meter


250 (17)

250 (121)

40 GPH/2500 sccm

Arma-View® II


1500 (100)

400 (204)

25 GPH/117 SCFH

Armored Purge Meter


1500 (100)

800 (427)

10 GPM/53 SCFM

Series 55-200 Armored Flow Meter


1500 (100)

400 (204)

130 GPM/150 SCFM

Glass Tube Varea-Meter® Unit


300 (20)

200 (93)

69 GPM/281 SCFM

Metal Tube Varea-Meter® Unit


600 (315)

48.4 GPM/205.8 SCFM