Sensor arrangement

US6250152A · kind A · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Manfred Klein · Highland Park, US
• Anton Knoll · Ulm, DE
• Klaus Land · Neckargemünd, DE
• Rudolf Thom · Stuttgart, DE
• Harald C. Ott · Wenham, US

Key dates

• Filing date: Dec 29, 1997
• Grant date: Jun 26, 2001
• Expiry date: Dec 29, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/2888
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor arrangement determines a condition and level of a liquid in a container. A first sensor has first electrodes forming a first measuring chamber communicating with the liquid and supplies a signal for determining an impedance of the first sensor and a condition of the liquid in the container. A second sensor has second electrodes forming a second measuring chamber communicating with the liquid via the first measuring chamber and supplies a signal for determining an impedance of the second sensor and a level of the liquid in the container. Electronic devices are coupled to the first and second sensors, and determine the impedance of the first and second sensors and the condition and level of the liquid in the container.