Underground Water Leak Detectors

Noise and vibration occur at the exit point of a pressurized water pipe where the water flows out into the surrounding soil at a rapid rate. Structure borne is the term used to describe this noise, when sound arises from the actual impact of an object on a building element, and in this case underground water pipes. GAOTek provides powerful Underground Water Leak Detectors, which assist in pipeline management and in detecting restricting leaks.

When water is incorrectly flowing, underground water leak detectors have the right technology attuned to the right sort of sounds that can accurately detect where the pipe is leaking. GAOTek devices are well equipped to endure many different environments and perform adequately in order to reach maximum potential. A specialized microphone and powerful noise amplifier is able to discover the noise the ruptured pipe is making and filter out unnecessary sounds. This involves monitoring AE (acoustic emissions; high frequency elastic waves up to 0.1 to 1 MHz commonly generated by active leaks).


Most underground water leak detectors provide leak location, the pinpointing of leaks in pipeline. This is based on the measurement of leak related vibration and noise associated with structure borne. Noise sensors fastened to the outside of a pipeline creates a baseline of acoustic emission when the pipeline is intact. When a suspected leak occurs, the low frequency acoustic signal is measured and analyzed in comparison with the baseline acoustic emission. A significant deviation from the initial baseline noise measurements triggers a leakage alarm.

Monitoring the pressure and flow readings is a common way that underground water leak detections improve a pipline, as leaks change the hydraulics of the pipeline. The volume of the acoustic emissions and the distance they travel greatly rely on he pipe material and diameter. Therefore, acoustic emissions in materials like in plastic pipes, in concrete and asbestos cement pipes, and in large-diameter pipes, which are dominated by low frequencies (≤ 50 Hz), are hard to detect in listening surveys unless listening points are very close to the leak locations. GAOTek’s underground water leak detectors have designed specialized microphones and noise amplifiers to discover the precise location of the ruptured pipe and distinguish between hard to hear structure borne noises and ambient acoustics. As technology as progressed, frequency band selection and time delay range selection has allowed testing graphs more definite, easier for analysis.

API RP 1130 (Computational Pipeline Monitoring for Liquids) is the practice that focuses on the design, application, testing and procedure of a leak detection system. This standard outlines a number of requirements that a leak detection system should have, including:

·       Sensitivity: A Leak Detection System must ensure that the forfeiture of liquid in the occurrence of a leak is as small as possible. This stipulation places two requirements of the system; that it must detect leaks quickly, and detect even the smallest of leaks

·       Reliability: The user must be able to trust the leak detection system, meaning that it must appropriately address real alarms and ensure that it does not signal any false alarms which can waste time.

·       Accuracy: For leak detection systems that are able to calculate leak location and leak flow, this must be done accurately

·       Robustness: The Leak Detection System should continue to operate in non-ideal circumstances. In the case of a transducer failure, the system should detect the failure and continue to operate (possibly with necessary compromises such as reduced sensitivity).


GAOTek provides high quality yet cost efficient underground water leak detection systems that accurately detect leaks in underground water systems. GAOTek’s underground water leak detector uses digital signal processing technology whose measurement parameters overcomes and automatically distinguishes between operating noise and that of leakage noise signals. GAOTek’s underground water leak detectors also feature an LCD display for measurement reads, a rechargeable battery and the ability to operate in freezing temperatures and in the extreme heat, ranging from 14F~122F(-10°C~+50°C).


Municipalities need to manage leakage in their water pipe networks for the safety of the economy. Droughts, rising energy costs, and increasing environmental, social and political issues have made leak detection that much more important. The implementation strategies for the management of underground water leaks is vital in order to reduce losses affecting the distribution networks of drinking water. The leakage and subsequent loss of drinking water represent a very high cost, a danger for the public health. The leaking flow may cause infrastructure damage to the foundations of buildings and roads, and contamination by pollutants may occur.  With water loss being a waste of a limited resource, adopting the appropriate policies for pipe bursts and leaks appears essential for future generations. Geo-phone versions of leak detection systems save on excavations costs, but the acoustics emissions will fade as it reaches the surface.

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