Sensor for accurate measurement of levels in irregularly shaped tanks

A method for measuring the filling level in a non-uniform vessel, using a filling level sensor having an electrode group which extends vertically over the fillable vessel height which dips into the fluid and which forms electrical capacitors whose capacitances change in a measurable fashion when there are changes in the filling level, the capacitances being determined by a connected evaluation circuit and being represented as a signal which describes the filling level;

• wherein there is at least one measuring electrode which extends over the entire fillable vessel height;
• and
• wherein a plurality of reference elements are arranged at different reference heights within the fillable vessel height such that the distance separating each of the reference elements results in an equivalent volume between the reference elements and wherein the filling level display is corrected with the discontinuities in the electrical behavior of the sensor which results owing to the arrangement of the measuring electrodes and the reference elements when the filling level changes beyond a reference height and wherein each of the reference elements have a shape proportional to the volume represented at the different reference heights.