Wastewater Treatment Plant - Intake Area

Open Channel Flow Measurement

Open Channel Flow Measurement
View of measurement place
Open Channel Flow Measurement


  • Rectangular channel made of concrete, width 1m
  • Part filled
  • Strong fluctuation between daily and nightly inflow

Definition of tasks

  • Continuous flow rate measurement in a WWTP intake area
  • Additional external level measurement shall be avoided
  • Cost-efficient, for monitoring only
  • No high accuracy is required
  • Quick and easy sensor mounting
Open Channel Flow Measurement
Schematic diagram of a combi sensor with pressure measurement cell in a rectangular channel
Open Channel Flow Measurement


  • The flow measurement system Type OCM F operates based on the Doppler principle.
  • A wedge-shaped flow velocity sensor has been installed in the center of the rectangular channel.
  • The flow velocity sensor has been equipped with a pressure measurement cell to avoid the need for an additional external level measurement.


  • Easy, quick and robust installation
  • Cost-effective measurement
  • Velocity and level measurement in one sensor

Used products

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