variable-area flow meter / for gas / for liquids / precision
FR Riels Instruments



  • Technology:


  • Fluid:

    for gas, for liquids

  • Other characteristics:

    precision, direct-reading, glass tube, flange, stainless steel, PVC, PTFE

  • Process pressure:

    10 bar (145.04 psi)

  • Process temperature:

    70 °C (158 °F)

  • Volumetric flow rate:

    12,000 l/h (3,170.1 us gal/h)


The FR series is manufactured by Riels, and is a flowmeter that is ideal for use in measuring low up to high flow rates of all kinds of liquid together with the conditions of the temperature and pressure contained with the limits of the resistance of the tube made of glass.

The flowmeter is made of Plexiglas, and has a tapered bore measurement that is calibrated and polished that is obtained directly in the design. The guided for flee float is available in a variety of elements such as AISI 316-grade steel, PVC, PTFE, Moplen, and Hastelloj.