Channel Networks - Portable Measurements

Flow Measurement under poor hydraulic Conditions

[Translate to english:] Kanalnetz
[Translate to english:] Durchflussmessung bei schwierigen Bedingungen
[Translate to english:] Temporär im Kanal eingesetztes Messsystem
[Translate to english:] Durchflussmessung bei schwierigen Bedingungen


  • Drainage line DN 300 of leisure park
  • Part filled
  • Concrete drainage line in ailing condition
  • High discharge dynamics and turbulent discharge due to upstream feed pump
  • Ex Zone 1

Definition of tasks

  • Determination of channel capacity and costs allocation for the planned expansion of the leisure park
  • Accurate detection of flow rates to determine the dimensions of a newly planned wastewater line
  • The poor hydraulic ambient conditions and the high discharge dynamics should not affect the demanded measurement accuracy of the system used.
Flow Measurement under poor hydraulic Conditions
Installation principle of measurement system
Flow Measurement under poor hydraulic Conditions


  • To improve the poor hydraulic discharge conditions a mobile Type NPP measuring pipe was inserted into the approaching pipe by using a bubble.
  • Thanks to the aid of a 90° elbow the pipe was full filled resulting in otimum measurement conditions.
  • The flow velocity detection was carried out based on the ultrasonic cross correlation principle.
  • Power supply and data storage were implemen-ted through a battery-powered PCM Pro transmitter.


  • Easy, quick and safe installation through lightweight plastic pipe.
  • Exactly defined cross section
  • Homogenised flow conditions at the measurement point and therefore highest system accuracy.

Used products

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