Electrochemical measuring device

Abstract

Abstract 1. Electrochemical measuring device for the determination of the oxygen content in gases having at least one solid electrolyte (32; 76; 92; 232) which is provided with a heating element (36; 82; 90; 236), which solid electrolyte is provided with electrodes (56, 58), of which at least one electrode (58) can be impinged upon by the test gas in the path of which there is disposed at least one barrier (42; 82; 94; 242) which is heatable by the heating element and penetrable by diffusion, which borders on a test gas space (52; 86; 112; 252) connected to the measuring point by a feed line (48; 248) and which limits the supply of the test gas to the electrode in such a manner that the electrode (58) can extract the entire oxygen component of the test gas, this oxygen being transportable by means of an electrical current through the solid electrolyte (32; 76; 92; 232) to a second electrode (56) and the electric current flowing in this process being detectable as a measure of the oxygen content, characterized in that the barrier (42; 84; 94; 242) is constructed as an independent component, is easily exchangeable, is separated by at least the solid electrolyte (32; 76; 92; 232) and also at least one second gap (44; 75; 98; 244) from the heating element (36; 82; 90; 236) and is heatable to a temperature below the solid electrolyte temperature, preferably to at most 300 degrees Celsius.

Inventors

• 👤 Franz-Josef Dr. Rohr
• 👤 Wing Fong Dr. Dipl.-Chem. Chu
• 👤 Robert Böhm

Bibliographic Details