Level sensor for detecting the level of a medium

Abstract

A level sensor comprises an electrical-connection structure and a level-detection structure. The level-detection structure comprises a plurality of elongated electrodes, which include at least three measuring electrodes. The elongated electrodes extend at least partially in side-by-sidey positions in a length direction of the level-detection structure and each have a proximal end and a distal end relative to the electrical-connection structure. The level-detection structure is divided, in the length direction, into a succession of detection sections, each of which includes two effective portions of two respective measuring electrodes, the two effective portions extending to a prevalent extent substantially parallel and equidistant, at a first predetermined distance from each other, in the length direction. In the detection sections there also extends, in the length direction, a non-effective portion of one further elongated electrode other than the two measuring electrodes that define the two effective portions of the corresponding detection section, the at least one further elongated electrode being one measuring electrode or else a reference electrode. The elongated electrodes are shaped in such a way that, at one or more of the detection sections, the non-effective portion of the at least one further elongated electrode extends to a prevalent extent at respective second predetermined distances from the corresponding two effective portions, the second predetermined distances being greater than the first predetermined distance.