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Hydrostatic level measurement
The pressure exerted at a particular depth of a given fluid is directly proportional to the height of the column of this fluid above the position in question. For water, which has a density of 1 g/cm³, the pressure increases by around 100 mbar per metre of water depth. By calibrating on the basis of the density applicable for the fluid in question, the output signal of a hydrostatic level probe can be adjusted to the depth of fluid to be measured.