Abstract: The present disclosure relates to a reference electrode including an electrical conductor, an electrically conductive salt bridge provided for contact with a measuring fluid, and a medium electrically conductively connecting the electrical conductor and the salt bridge to each other, wherein the medium and the electrical conductor are completely isolated with respect to the measuring fluid. The salt bridge comprises a polymer matrix and a conducting salt, the conducting salt is formed from a cation and an anion, and the cation and/or the anion are at least partially kept from leaching in the polymer matrix. The present disclosure further relates to an electrochemical sensor, a method for producing the reference electrode and a method for regenerating and/or conditioning the reference electrode.