Polarographic/amperometric measuring sensor

US5007424A · kind A · utility

Assignee

• Hellige GmbH · DE

Inventors

• Walter Ahsbahs · Freiburg im Breisgau, DE
• Helmut Leist · Freiburg im Breisgau, DE

Key dates

• Filing date: Jun 29, 1990
• Grant date: Apr 16, 1991
• Expiry date: Jun 29, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/404
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

This invention provides a polarographic/amperometric measuring sensor, particularly useful for transcutaneous determination of the oxygen partial pressure (tcpO.sub.2) in the blood by means of a Clark-type electrode arrangement. According to the invention the counter electrode, preferably made of a noble metal, is disposed about the insulating material encasing the working electrode and is preferably made of the same noble metal as the working electrode. The measuring sensor can also be provided with a pH electrode for simultaneous determination of the carbon dioxide partial pressure (tcpCO.sub.2) in the blood.