Sensor arrangement for determining a tank fill level, and method for producing it

US8627718B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Markus Ulrich · Hersbruck, DE
• Vlatko Babic · Cologne, DE
• Guenther Krenz · Steinheim, DE
• Rainer Haeberer · Bretten, DE
• Wolf-Ingo Ratzel · Echterdingen, DE
• Bruno Hezel · Stuttgart, DE
• Michael Gerlach · Waiblingen, DE
• Vaclav Straus · Lovosice, CZ

Key dates

• Filing date: Oct 31, 2008
• Grant date: Jan 14, 2014
• Expiry date: Apr 19, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49826
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a sensor arrangement for determining a tank fill level of a liquid, especially a reducing agent for removing nitrogen from the exhaust gases of an internal combustion engine, which liquid is contained in a tank, at least two electrically conductive measuring electrodes being at least partially embedded in a carrier that is produced of an electrically non-conductive material. The sensor arrangement includes a temperature sensor, especially a resistor with negative temperature coefficient being used as a temperature sensor, which is integrated into the carrier.