Leak Detection

Description of the method for locating cracks and leaks using MLM, a bundle of methods including direct current potential method and resistance measurement. The floor, walls, and roof sealing are leaking at one or more locations, causing water to seep into the structure or building.

Potential Measurement

For potential measurement, it is necessary to place an electrode in the damp areas. Water should be present, preferably after a rainy period. The areas to be examined must be freely accessible. An installation plan (water supply and drainage, power lines, etc.) should be available before starting the measurements.
Measurements can be conducted indoors or outdoors, depending on the circumstances.

MLM/p (Multiple Leakage Measurement / Potential) is a method I developed for locating cracks or leaks and, consequently, water ingress in buildings. It is a direct current method in which a constant current is fed into the ground and the building through two electrodes. The potential field in the building or outside the building is then captured by two additional electrodes. The signal is recorded using digital and analog measuring instruments, processed further on the computer, and used to identify damage points.
The result is a layer line representation with identified entry points as maxima.
MLM/p detects leaks in the presence of water depending on the connection to the power source and establishes a reference between the leakage point and the injection point.
MLM/e (Multiple Leakage Measurement / self-potential) establishes a reference between a wall electrode and a reference electrode. The wall electrode has a different potential at each measuring point due to the varying substrate conditions (water content) that is measured.
The result is a layer line representation of the determined water saturation.

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