Acoustic leak detection is an effective and well-documented method for locating hidden leaks in district heating networks. By recording and analyzing the sound that occurs when hot water under pressure flows out of a leaking pipe, the location of the leak can be determined quickly and with high precision.

At Danish Water Innovation, we offer complete solutions for monitoring, leak detection and precise location of leaks on district heating pipes. Our solutions include permanent monitoring systems, advanced listening instruments, data loggers, correlators and training for operating personnel.

From drinking water to district heating – 50 years of experience with acoustic leak detection – 30 years of experience with loggers.

Acoustic leak detection has been one of the most effective methods for locating hidden leaks in drinking water networks for decades. At Danish Water Innovation, our solutions for district heating are based on more than 50 years of practical experience with this technology.

Through thousands of leak searches, we have built a deep understanding of how sound propagates in different pipe materials, how background noise affects measurements, and how the most effective search strategy is adapted to local conditions. We have now brought this knowledge and experience into the district heating sector.

The basic acoustic principles are the same. The difference is that modern sensors, data loggers and analysis tools have now been developed to also work on district heating pipes with temperatures of up to 120 °C.

This means that district heating companies can now benefit from a proven method that has been used on water supply networks for decades – combined with the latest technology, developed specifically for the district heating network.

At DWI, we therefore not only supply equipment. We supply the experience, method and professional knowledge that makes the technology an effective tool in daily operations.

Intelligent monitoring of the district heating network

Modern acoustic data loggers make it possible to monitor the district heating network around the clock. The loggers automatically detect changes in sound levels and identify areas with suspected leaks.

When a potential leak is detected, the area can be examined more closely with professional listening equipment to locate the leak quickly and accurately. This reduces heat loss, operational disruptions and the time spent troubleshooting.

Precise localization with professional equipment

We offer a complete range of professional equipment for acoustic leak detection on district heating pipes, including:

• Intelligent acoustic data loggers.
• Correlators
• Geophones
• Ground microphones
• Hydrophones
• Analytics and cloud solutions

The solutions can be used both for permanent monitoring and for specific leak detection tasks.

A complete solution

DWI helps throughout the entire process – from initial considerations to daily operations.

We offer, among other things:

• Analysis of existing monitoring strategies
• Delivery of professional equipment
• Installation and commissioning
• Training of operating personnel
• Practical leak detection
• Technical advice
• Ongoing support

Our goal is to provide utilities with the best opportunities to quickly identify and locate leaks, reduce heat loss and optimize operations.

Why choose Danish Water Innovation?

At DWI, we combine more than 50 years of experience with market-leading acoustic technology.

We advise independently, supply professional equipment from international manufacturers and help our customers translate technology into concrete results through practical experience, training and technical support.

We believe that the best results are achieved when the right technology is combined with the right knowledge.