Digitization of district heating grids with automatic leak detection

Why leak detection sensors?

  • Direct detection of excavation damage
  • Continuous monitoring of pipes during warranty period (and beyond)
  • Savings of operational man-hours
  • Reduced administrative burden (direct and automatic historical measurement reports incl. audit trail)
  • Extended lifetime of pipes
  • Less serious damages and lower damage costs
Leak detection



  • Insulation resistance (Range: 5k Ohm – 1G Ohm, Accuracy: ± 10% + 0.1% of range)
  • Loop resistance (Range: 0-500 Ohm, Accuracy: ± 2% + 0.1% of range)
  • Voltage: 10V (Imax 10mA) – 250V DC (Imax 4mA)
  • IP-rating: 65
  • Communication protocol: GPRS or NB-IoT
  • Remote adjustment of measurement frequency (1X/minute to 1X/week)
  • Remote pausing of measurements during works
  • Does not need to be physically decoupled during welding

Number of measurement loops:

  • 4 (for 1- or 2-wire measurement systems)
  • 8 (for 4-wire measurement systems)


  • Mains power (230V)
  • Battery (without replacement 6 years with 4X/day measurement)

According to the norms:

  • CE
  • EN 14419
  • EN 55011
  • EN 61000-6

Installation proces:

  • Less than 15 minutes installation time per sensor
  • Can be installed by field mechanic (no extra certifications required)
  • Automatically coupled to asset and GIS-systems via online platform

Software platform environment

  • Graphic representation of pipes and measured insulation and loop resistances
  • Overview of actual and all historical measurement data
  • Setting of thresholds and receiving alarms via e-mail
  • Advanced user / access matrix with specific roles for measurement specialist and asset manager
  • Full audit trail (including changes to measurement frequency and thresholds)
  • Report functionality
  • Annotation functionality (explain measurement anomalies)
  • Data export functionality
  • Link with customer systems via API or OPC UA connection


  • Complete end-to-end data encryption (CoAP over DTLS)
  • Data processing and storage in line with ISO 27018 and GDPR legislation

Who preceded you?

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