Electrochemical Sensor

Abstract

An electrochemical sensor comprising a probe immersible in a measured medium and having at least two electrodes of a first electrically conductive material and at least one probe body of a second, electrically non-conductive material. The electrodes are at least partially embedded in the probe body and insulated from one another by the probe body, wherein the at least two electrodes are embodied of at least one conductive material and the probe body of at least one electrically insulating ceramic, wherein the electrodes are embodied of thin, measuring active layers of a conductive material and sit in an end face of the probe body of a ceramic material, and wherein the electrodes are electrically contacted via connection elements extending through the probe body.

1 - 12 . (canceled) 
     
     
         13 . An electrochemical sensor comprising:
 a probe immersible in a measured medium and having at least two electrodes of a first electrically conductive material and at least one probe body of a second, electrically non-conductive material, wherein:   said electrodes are at least partially embedded in said probe body and insulated from one another by said probe body;   said at least two electrodes are embodied of at least one conductive material and said probe body of at least one electrically insulating ceramic;   said electrodes are embodied of thin, measuring active layers of a conductive material and sit in an end face of said probe body of a ceramic material; and   said electrodes are electrically contacted via connection elements extending through said probe body.   
     
     
         14 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said measuring active layer of the conductive material of said electrodes has a coating thickness d of 10 μm-3 mm; and   said measuring active layer sits gap-freely in the ceramic material of said probe body, so that the end faces of said electrodes and said probe body form a plane (A).   
     
     
         15 . The electrochemical sensor as claimed in  claim 14 , wherein:
 the conductive material comprises one of an electrically conductive ceramic, an electrically conductive enamel and a metal, especially platinum, titanium or stainless steel.   
     
     
         16 . The electrochemical sensor as claimed in  claim 13 , wherein:
 the ceramic material comprises at least a zirconium oxide (ZrO 2 ) ceramic, an aluminum oxide (Al 2 O 3 ) ceramic, a chromium oxide (Cr 2 O 3 ) ceramic, a titanium dioxide(TiO 2 ) ceramic, and/or a tialite (Al 2 TiO 5 ) ceramic.   
     
     
         17 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said electrodes comprise platinum; and   said probe body comprises a zirconium oxide ceramic stabilized by means of magnesium.   
     
     
         18 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said probe body is connected with a process connection.   
     
     
         19 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said process connection is embodied as one-piece with said probe body of the same electrically insulating ceramic.   
     
     
         20 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said process connection is connected at a joint mechanically and sealingly with said probe body by means of a joining means.   
     
     
         21 . The electrochemical sensor as claimed in  claim 13 , wherein:
 said electrodes are ring-shaped and arranged concentrically about a shared axis.   
     
     
         22 . The electrochemical sensor as claimed in  claim 13 , wherein:
 the electrochemical sensor is embodied as a conductive conductivity sensor.   
     
     
         23 . A method for manufacturing an electrochemical sensor, comprising the steps of:
 producing in a first step a green body of a probe body from the electrically insulating ceramic;   in a second step, pressing electrodes with their connection elements into the green body or introducing the electrodes with their connection elements into corresponding cavities in the green body; and   sintering in a third step the green body with the introduced, respectively pressed in, electrodes and connection elements.   
     
     
         24 . The method for manufacturing an electrochemical sensor as claimed in  claim 23 , wherein:
 a process connection is mechanically stably and sealingly connected with the probe body at a joint by means of a joining means, especially by means of an adhesive connection; and   the region of the joint after the joining together and/or the end face of the probe body with the therein gap-freely embedded electrodes are/is processed such that material is removed.