variable-area flow meter / for gas / for liquids / direct-reading
FPL Riels Instruments



  • Technology:


  • Fluid:

    for gas, for liquids

  • Other characteristics:

    direct-reading, precision, plastic tube, in metering tube, stainless steel, PVC, PTFE

  • Process pressure:

    10 bar (145.04 psi)

  • Process temperature:

    70 °C (158 °F)

  • Volumetric flow rate:

    30,000 l/h (7,925.2 us gal/h)


The FPL series is manufactured by Riels, and is a flowmeter that is ideal for use in measuring applications such as measuring low, medium, and high flow rates of all liquids in the duct together with the conditions of the temperature, and the pressure contained within the limits of the resistance of the tube made of glass. It also has the capacity to measure corrosives and acids,

The unit is made of Plexiglas with tapered bore of calibrated and polished midura obtained directly in the design. The guide or free float is available in a variety of materials such as AISI 316-grade stainless steel, PVC, PTFE, Moplen, and Hastelloj.