Base plate and a sensor assembly part for an ostomy appliance

A base plate for an ostomy appliance, the base plate comprising:

• a first adhesive layer with a proximal side configured for attachment of the base plate to the skin surface of a user, the first adhesive layer having a stomal opening with a center point;
• and
• a plurality of electrodes arranged between the first adhesive layer and a top layer, the plurality of electrodes including a reference electrode, a first electrode, and a second electrode, the reference electrode comprising a reference connection part, the first electrode comprising a first connection part, and the second electrode comprising a second connection part, wherein:
• the reference electrode and the first electrode form a first sensing region between the reference electrode and the first electrode;
• the reference electrode and the second electrode form a second sensing region between the reference electrode and the second electrode that is different than the first sensing region;
• and
• the first sensing region is arranged at least partly annularly around the stomal opening at a first radial distance from the center point that is smaller than a second radial distance between the second sensing region and the center point.