Since measuring liquids with a direct
voltage quickly leads to catalysis
effects and corrosion, the gauge
uses a rectangular voltage. The gauge
is intended primarily for measuring
the level in a rainwater reservoir, but
can, of course, also be used for measuring
other kinds of liquid. In the
prototype, eight sensors in the reservoir
were used. Placing these sensors
at well-thought-out locations will minimize
any errors in the measurements.
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