Determination of Infiltration Water in small Pipelines

Channel Networks - Portable Measurements


  • Concrete pipe DN 250
  • Partially filled, low level
  • Very low flow rates
  • Ex Zone 1
  • No mains power supply available


Definition of tasks

  • Continuous flow rate measurement to determine the extraneous water volumes
  • Reliable detection of lowest flow rates during night hours
  • Quick and easy installation
  • Long system battery life


  • The portable, Ex-protected flow meter Type NivuFlow Mobile 750 was used.
  • To detect even lowest flow rates, the mini sensor Type CSM with a height of merely 21 mm was used.
  • The low flow levels within the small pipe diameter are detcted by using a small Type DSM special air-ultrasonic sensor.


  • Quick and straightforward installation by using a special pipe mounting system
  • High accuracy and reliability
  • Long battery life of several months without the need to replace the rechargeable battery

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