| abstract |
The invention relates to a potentiometric probe (1, 100, 200) for measuring a measured variable representing an ion concentration in a measuring medium, with a probe base (4, 104, 204) comprising a sensor circuit (5, 105) and two electrochemical half-cells, which are arranged in such a way that one of the half-cells surrounds at least a section of the other half-cell, at least one of the half-cells being designed as a module that is connected to the probe base via a mechanical and electrical interface. One of the half-cells can form a measuring half-cell (2, 102, 202) which comprises an ion-selective membrane (9, 109, 209) and a discharge line (10, 110, 210) electrically contacting the ion-selective membrane (9, 109, 209). The other half-cell can form a reference half-cell (3, 103, 203), the measuring half-cell (2, 102, 202) and / or the reference half-cell (3, 103, 203) each being designed as a module that has a mechanical and electrical Interface with the probe base (4, 104, 204) is connected. |