Electrochemical gas sensor

US6645361B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Bernhard Bloemer · Stuttgart, DE
• Rainer Strohmaier · Stuttgart, DE
• Carsten Springhorn · Stuttgart, DE
• Detlef Heimann · Gerlingen, DE
• Hans-Joerg Renz · Echterdingen, DE
• Harald Neumann · Lambach, DE
• Margret Schuele · Weil der Stadt, DE
• Bernd Schumann · Rutesheim, DE
• Thomas Moser · Schwieberdingen, DE
• Sabine Thiemann-Handler · Stuttgart, DE

Key dates

• Filing date: Jan 14, 2002
• Grant date: Nov 11, 2003
• Expiry date: Jan 14, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/417
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electrochemical gas sensor for determining the concentration of gas components in a gas mixture, in particular for determining NOx and HC. The gas sensor includes a first measuring gas space which is connected to the measuring gas, and a second measuring gas space which is connected to the first measuring gas space by a connecting channel. Furthermore, a first electrode and a second electrode, arranged in the first measuring gas space, and at least one third electrode arranged in the second measuring gas space, and at least one fourth electrode are provided. The two measuring gas spaces are arranged in layer planes on top of one another and are separated from one another by at least one oxygen ion conducting layer, the connecting channel passing through the oxygen ion conducting layer.