The H2 Measurement Procedure:

With the Gas-Check-H2 even tiny little leakages can be pinpointed. Hydrogen diffuses through almost any material due to its molecular size. The pipeline section to be checked is filled entirely with gas, and the pressure is increased slowly until the measurement varies according to the size of the leakage, the kind of soil, and the surface structure. The leakage on the pipeline will be below the the spot showing the highest concentration of gas. Usually, the location indicated by the gasCheck does not deviate by more than a few centimetres from the actual leakage location.

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