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



  • Technology:


  • Fluid:

    for gas, for liquids

  • Other characteristics:

    precision, direct-reading, glass tube, in metering tube, aluminum

  • Process pressure:

    10 bar (145.04 psi)

  • Process temperature:

    70 °C (158 °F)

  • Volumetric flow rate:

    150 l/h (39.6 us gal/h)


The FA/M is a series of flowmeters from Riels that is suitable for small flows of liquids and inert gases. The series analyzes the flow rate with high precision on the scale. It is graduated with screen-printed scales on the body of the instrument. The device is forged from acrylic components with a tapered bore measurement that is shown directly on the body.

The float is made of AISI 216 stainless steel and is spherical in shape. It may come in nylon, glass, aluminum, and other materials in order to adhere to the processing fluid. The flowmeter is integrated with a needle valve to allow it to adjust and provide the proper dosage of the fluid to the specified value.