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Solutions > Leakage Management > GSM noise logger


The PermaNet system from HWM combines Permalog leak noise sensor and our versatile telemetry data
technology to create a fixed network to monitor leakage.

Remote programming and changing off all parameters, including sampling frequency.

Once installed, leak data calculated using the proven Permalog algorithm, and secondary data, is transmitted via low cost GPRS or SMS telemetry. This removes the requirement for expensive site visits and "drive by" data retrieval.

Potential Leak Areas Quickly Identified

PermaNet+ allows leakage teams to monitor the status of each logger deployed from map based host software any internet enabled device using ALMOS LEAK. The system works in conjunction with Google Maps technology to provide a live on screen tracking, allowing leakage teams to respond quickly to problem areas and bring them under control efficiently

Secondary Validation

Once the presence of a leak has been identified, secondary measures can be used to check and remove
'false positives' and also to localise the leak position.

Correlation – Audio files are used to correlate remotely to localise the leak position for follow up

Aqualog – remotely retrieving the Aqualog detailed noise graphic, clearly indicates the consistent presence of a leak.

Audio – For operators who prefer to 'hear' their leaks audio files are transferred to the host.

Permalog® enables water suppliers to quickly and efficiently locate leaks in the water network. Loggers are deployed in areas of the distribution system to provide continuous monitoring of leakage. Easily installed on pipe fittings, they are retained in place by a strong magnet and are powered by low cost replaceable batteries. As soon as a potential leak is detected, the Permalog® unit enters an alarm state and transmits a radio signal to indicate a "LEAK" condition.

The effectiveness of Permalog® technology has been proven again and again in some of the harshest conditions on earth. Loggers are immersion-tested to IP68 and will continue to operate even in flooded chambers. Water suppliers can monitor 100% of their distribution system confidently and effectively, enabling leakage to be reduced quickly, and easily maintained at a low level.

The new Permalog+ includes Aqualog extended logging functionality, where noise is recorded at preset intervals over an extended period of time. The logger can store up to twenty-nine days of level and spread history and the noise trends identified can then be presented in graph format, enabling the user to distinguish clearly between leak and non leak noise. The highly versatile logger has user changeable plastic/metallic alarm threshold settings and allows data to be accessed via:

 •  Lift and Shift – loggers are removed from the ground and the data is manually retrieved
 •  Patroller "Drive By" - data is transmitted via radio to a moving patrol vehicle using a Patroller system       
 •  PermaNet – data is transmitted directly to an office computer via radio network or SMS repeater.

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