The determination of the angle of inclination is based on the measurements of conductivity over plane electrode structures.
On the bottom of the cell, partly filled with a conductive fluid, electrodes are applied parallel to the axes.
An electrical strayfield is formed out by appying an AC-voltage to the planar electrode structures. By tilting the sensor, the fluid level over the different electrodes and in consequence the conductivity, respectively the strayfield changes.
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