KRAL Flowmeters OMS Series.

Stainless steel design for demanding media.

When selecting a flowmeter for demanding fluids, the issue of material resistance always arises. The KRAL flowmeter OMS series is a stainless steel design for low and high viscous media, equipped with ball bearings or plain bearings depending on the application.

Your benefits.

  • High accuracy positive displacement meter.
  • Low service costs and long lifespan with KRAL products.
  • Extremely robust liquid flow meter.
  • Stabilization zones unnecessary.
  • Low friction and minimal loss of pressure.
  • Very compact design of the measuring unit.
  • For harsh industrial conditions.

Application examples.

  • Dosing of resin, paints, adhesives.
  • Coating of propellers in wind power turbines.
  • Insulating materials.
  • Greases and waxes.
  • Water volumetric flow measurements.


  • Housing: Stainless steel.
  • Screws: Stainless steel (coated for high viscosity media).
  • Bearings: Ball or sliding bearings.
  • Gasket with ball bearings: Viton®.
  • Gasket with sliding bearings: Teflon®.
  • Technical data.
    Technical dataOMS-020OMS-032OMS-052OMS-020
    Media Low viscosityLow viscosityLow viscosityHigh viscosity
    Nominal diameterDN inch¾11 ½¾
    Flow rate l/minQmax45150525-**
    Max. pressurebar185185120400
    Temperature°C-20 to +150-20 to +150-20 to +150-20 to +80
    Viscositymm²/s1 to 10²1 to 10²1 to 10²10² to 10⁶
    Precisionof measurement value±0.1 %*±0.1 %*±0.1 %*±0.5 %
    Repeatability ±0.01 %±0.01 %±0.01 %±0.01 %
    Frequencyat Qnom Hz64078082811,000
     * Information in the case of non-lubricating media on request.  
    ** Due to the wide viscosity range from 100 to 1,000,000 mm²/s, the max. 
        flow rate cannot be given across the board.
  • Sensor.
    SensorBEG 44ABEG 47D** / BEG 47E**
    Application High pressures,
    broad temperature range
    K-factor K2K1
    Signal PNPNamur
    Temperature[°C]-25 to +120-25 (-40) to +100
    Max. pressure[bar]42040
    **dependent on temperature
  • Operating instructions.