How digital monitors make water losses visible
When water flows at night and no one uses it
In drinking water networks, the night is a silent ally. When consumption drops, it’s time to hunt for leaks. That’s because a constant flow rate during the night can be a clear sign that the system is losing water somewhere in the network. And this is exactly where the data loggers come into play. These unassuming yet highly precise devices help detect hidden leaks long before they become visible.
What do data loggers do?
Depending on the model, data loggers measure flow, pressure, or noise in the pipeline network. They are installed at strategically important locations, such as transfer points or network junctions. There, they regularly collect measurement data and either store it or transmit it for analysis.
For example: A logger performs a zone scan and shows a constant flow rate of 0.8 l/s over several nights, even though no water is being drawn. This is a typical indication of a leak.
From suspicion to certainty: The leak detection begins
As soon as a suspicious flow is detected, the network is systematically analyzed. Water utility technicians gradually shut off sections of the network to narrow down the affected area. The smaller the zone, the more precisely the further leak detection can be carried out.
Noise loggers such as the SmartEAR® are often used here. These devices “listen” for suspicious noises or whistling sounds in the piping system, which can indicate pressure losses due to leaks. Multiple loggers can be combined to pinpoint a specific location.
Correlation for precise positioning
Once the suspected area has been narrowed down, the exact leak location is determined using correlation. This process involves two sensors, known as correlators, are attached to different points along the pipe. Both sensors detect the sound emanating from the leak. Based on the difference in the sound’s travel time between the sensors and the known speed of sound in the pipe material, the device calculates the exact location of the leak.
Example: Under ideal conditions, the Correlux C-3 correlator delivers pinpoint-accurate results—often to within a few meters—even with difficult pipe materials.
Why teamwork matters
Successful leak detection is no longer a standalone discipline. Data loggers, noise loggers, correlators, and modern cloud platforms work hand in hand:
- Data loggers provide the clues.
- Noise loggers help narrow down the source.
- Correlators locate the leak.
- The platform documents, archives, and links all information.
This creates a smart early-warning system for water distribution— proactive rather than reactive.
How to get the most out of your logger network
- Take advantage of the night: The most meaningful flow data is collected between 2:00 and 4:00 a.m.
- Defining small zones: The finer the network structure, the easier it is to locate leakage losses.
- Analyze data regularly: Continuous monitoring helps detect even subtle damage.
- Combining Systems: Data loggers and correlators work together to provide the most reliable picture.
Data loggers & POSEYEDON® Cloud as the memory of the pipe network
At a time when water is becoming a strategic resource, precise management of water loss is essential. Modern data loggers reveal leaks that would otherwise have gone unnoticed for years. Combined with correlation and acoustic sensor technology, silent pipelines are transformed into a system that provides early warnings, directs efforts effectively, and protects resources.
Would you like to learn more about smart leak detection or set up a monitoring system?
We’d be happy to advise you—with data-driven, practical, and forward-looking insights.