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GLD - Gottsberg Leak Detection

Are you on the same wave-length as your leaks?

The functionality of the GLD 202 Leak Detector.

The GLD 202 was developed to use multichannel spectrographic analysis. Leaks in pipelines produce sounds. Depending on the size and form of leaks, whether rips or holes, different pressures, the type of liquid and the temperature , certain sound signatures show up. Past investigations have shown that leaks generally show an increase in volume in the frequency range between 20 and 40 kHz. More exact analyses by the Gottsberg company in real-world operations, as well as extensive tests on our internal test stand, have confirmed these results and led to the following conclusions:

  • Other acoustic sources, like pumps, impact or sharp noises, as well as flow disturbances, also produce harmonics in the relevant range.
  • Brief events, like transients, may not be recognized when using a measurement window duration of one second.

The GLD 202 allows setting a longer duration than other detectors, and uses various algorithms for multi-channel frequency analysis as well as transient recognition. This makes it possible for it to distinguish mechanical interference from high-frequency leak noises. By using higher resolution in both frequency and time, the GLD 202 is able to make more exact and reliable distinctions between different sound signatures, and so ensure verified identification of leaks.


GLD - Gottsberg Leak Detection
Type 1

Quiet background noise

  • low energy
  • rather low-frequency
GLD - Gottsberg Leak Detection
Type 2

Loud background noise

  • greater energy
  • rather low-frequency
GLD - Gottsberg Leak Detection
Type 3

Coming from an obstacle, like a pig trap or other noise source

  • rising energy
  • rather low-frequency
GLD - Gottsberg Leak Detection
Type 4

Recurring peaks

  • typical of wheel noises
  • typical of pipe seams
  • rather low-frequency
GLD - Gottsberg Leak Detection
Type 5

Marker signal

  • rising and falling over time
  • frequencies sharply defined
GLD - Gottsberg Leak Detection
Type 6

Transient or impact signatures

  • strong signal rise
  • defined peak frequencies
  • determines the material (e.g. rubber or steel)
GLD - Gottsberg Leak Detection
Type 7

A detected leak

  • fast-rising
  • slowly falling
  • frequencies predominantly ultrasonic
  • no significant frequencies in audible range