Data Loggers in Action

How Digital Monitors Make Water Losses Visible

When the water runs at night and no one uses it

In drinking water systems, the night is a silent ally. When consumption drops, it’s time to hunt for leaks. Because a constant flow during the night can be a clear sign: somewhere in the network, the system is losing water. And this is exactly where the work of the data loggers. These unassuming yet highly precise devices help detect hidden leakslong 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 store or transmit it for analysis. An 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. A typical indication of a leak.

From Suspicion to Certainty: The Search for Leaks 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.

These are also often used here noise loggers such as the SmartEAR® are often used here. These devices “listen” for suspicious rattling or whistling noises in the piping system, which can indicate pressure losses due to leaks. Multiple loggers can be combined to focus area .

Correlation for Precise Positioning

Once the suspected area has been narrowed down, the next step is precise leak detection via correlation. This process involves two sensors, known as correlators, are attached at different points along the pipe. Both detect the sound emanating from the leak. Based on the difference in the travel time of the sound 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 single 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 Nighttime: The most meaningful flow data is collected between 2:00 and 4:00 a.m.
Defining small zones: The finer the grid structure, the easier it is to locate leakage losses.
Analyze data regularly: Constant monitoring helps detect even subtle damage.
Combining Systems: Data loggers and correlators work together to provide the most reliable picture.

Data Loggers & the POSEYEDON Cloud as the Memory of the Pipeline Network

At a time when water is becoming a strategic resource, precise management of losses 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 conserves 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.

Data Loggers in Use