Water monitoring
section of pipeline. Within days, the system flagged an anomaly. Engineers correlated the data between two loggers and confirmed a leak - releasing 600 cubic metres of water daily. Financially, the loss translated to €2,718 per day, or more than €990,000 per year. Without the system in place, the leak could have gone undetected for months. The area was hard to access and the manhole particularly deep. Yet the acoustic signature was clear, enabling rapid confirmation and repair. In this case, the return on investment was measured not in years, but in weeks.
A similar success was seen in Oslo, where 75 Enigma5 hydrophones helped reduce night-time water consumption from 80 litres per second to just 22. Around half of this saving was directly linked to the leak detection technology, delivering an estimated annual cost reduction of £105,000. Once again, the return on investment was not measured in years, but in immediate, measurable gains.
TOWARDS CONTINUOUS OVERSIGHT Portable loggers such as EnigmaREACH complement fixed systems by allowing utilities to
survey wider areas using the lift-and-shift method. Deployed across a stretch of pipeline, they record overnight and are retrieved for analysis the next day. By combining sweep-based and fixed monitoring, municipalities gain both flexibility and consistency - converting periodic inspection into continuous oversight.
The result is greater control over networks that were once monitored intermittently. Utilities can detect new leaks early and ensure repaired sections remain stable. With growing public expectations and rising costs, this ability to act quickly and accurately is critical.
EMPOWERING SUSTAINABLE PROGRESS As Nordic utilities respond to financial pressures and sustainability goals, the focus is shifting from repair to detection. The case in Hamar is one example - but similar stories are emerging across the region, from remote farmland to dense urban networks. The technology is proven, the need is pressing and the benefits are immediate. Ovarro’s portfolio of acoustic monitoring and telemetry solutions, including Enigma5, EnigmaREACH and advanced RTUs, is helping utilities close the gap between visibility and action. By revealing the unseen, Nordic municipalities are laying the foundation for long- term sustainability - one leak at a time.
Ovarro
www.ovarro.com Instrumentation Monthly April 2026 49
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