The invention relates to an ion-selective electrode (201), comprising: a housing (202, 215) which surrounds a housing interior, an ion-selective membrane (203), in particular a polymer membrane, and communicating with the ion-selective membrane in contact conductive system for deriving a potential the ion-selective membrane, the ion-selective membrane fills the housing interior at least partially, and with a housing surrounding the medium via at least one continuous through a housing wall of the housing bore (217) is in contact. The invention further relates to a combination electrode comprising an ion-sensitive electrode, a sensor array comprising a plurality of ion-selective electrodes, and a flow cell with integrated ion-selective electrode.
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