PermaNET+ is the award-winning leak detection system that combines a leak noise sensor with versatile telemetry technology, creating a fixed network to monitor leakage.

Representing the next stage in the development of noise logging and leak detection, PermaNET+ is an effective solution that is practical for large-scale deployment.



Once installed, leak data is calculated using the proven Permalog algorithm, with all information transmitted via low cost cellular telemetry. This removes the requirement for expensive site visits and “drive by” data retrieval.

PermaNET+ allows leakage teams to monitor the status of each logger deployed from map based host software with any internet enabled device using PermaNET Web.

Once the presence of a leak has been identified, secondary measures can be used to check and remove ‘false positives’, as well as localising leak position.


Key Features and Benefits

  • Quick response: enables leakage teams to respond quickly to specific locations when a leak is detected
  • Determine leak size: by matching daily alarms with flow data to enable prioritisation of leak alerts
  • Precise logging: ability to log noise more frequently to establish the noise profile and profile alarms for precise immediate leakage alarm
  • Secondary validation: 
    • Aqualog - detailed noise histogram to reduce 'false positives'
    • Audio - remotely listen to the noise
    • Remote correlation to localise leak position
  • Fully waterproof: the IP68 rating has been tested at 10m depth over a 24 hour period
  • Easy to use: compatible with HWM Deployment app. Select features can be programmed through PermaNET Web
  • PermaNET Web: software supports: -
    • Correlation
    • Map view
    • Aqualog
    • Select GIS file formats
    • Remote configuration
    • Filtering
  • External antennas: support improved signal strength (contact HWM for more information)


Case Studies

United Utilities - July 2019

Yorkshire Water - May 2019

Leif Koch - October 2017





Related Products

Subscribe to our Newsletter

By subscribing to this newsletter you consent to receiving promotional e-mails from HWM-Water. You can unsubscribe at any time by clicking the unsubscribe link in the e-mail.

HWM-Water Ltd
Ty Coch House
Llantarnam Park Way
Cwmbran, NP44 3AW
T: +44 (0) 1633 489 479 F: +44 (0) 1633 877 857 E:
The Queen's Award for Enterprise: Innovation 2017
A Halma company
ISO 9001 ISO 14001 ISO 18001 ISO 27001