| abstract |
A compact electrochemical measuring electrode device (1) constructed in thick film technique on a plane circular substrate (13) of a ceramic material such as alumina, the electrodes (14, 15) of the electrode device being arranged on one side of the substrate, and the electrical connections (20, 26, 27) being arranged on the other side of the substrate. In the substrate, a through-going passage is provided for establishing electrical junction between an electrode (14) and an associated electrical connection, and a metallic conductor is introduced into the passage, preferably in the form of a rivet or a solidifed metal paste. A terminal is applied in thick film technique on one side of the electrode device, and an electrode layer (14) is provided in thick film technique on the other side, both in direct electrically conductive connection with the conductor. Several layers of electrode material are applied, the area of the layers being reduced to provide a stepped configuration. In a polarographic electrode device, the cathode is platinum wire embedded in glass tube and secured and sealed in the through-going-passage by means of glass paste heated to above its normal application temperature. <IMAGE> |