KRAL Flowmeters OMS Series.

Stainless steel design for demanding media.

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

Your benefits.

  • High precision
  • Extremely robust
  • Stabilization zones unnecessary
  • Low friction and minimal loss of pressure
  • Very compact design.

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
                                           Low viscosity mediaHigh viscosity media
    Nominal diameterDN [inch]3/411 1/23/4
    Flow rate l/minQmax45150525-
    Max. pressure[bar]185185120400
    Temperature[°C]-20 to +150-20 to +150-20 to +150-20 to +80
    Viscosity[mm²/s]1 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 [Hz]64078082811,000
    * information in the case of non-lubricating media on request
  • Sensor
    SensorBEG 44BEG 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