Sensor element

US6027622A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Theodor Graser · Stuttgart, DE
• Hnas-Joerg Renz · Echterdingen, DE

Key dates

• Filing date: May 18, 1998
• Grant date: Feb 22, 2000
• Expiry date: May 18, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4071
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor element for an electrochemical sensor that determines the oxygen content of exhaust gases produced by internal combustion engines. The sensor element includes at least one measurement device and at least one heating device associated with the measurement device. The measurement device and the heating device both include individual functional layers laminated one above another. The heating device is covered with a surface layer that covers not only the surface of the outermost layer of the functional layers of the heating device, but also the side surfaces of all the functional layers of the heating device.