Patent · US Expired

Electrochemical sensor for determining the oxygen concentration in gas mixtures

US5630920A · kind A · utility

138Cited by

7References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Karl-Hermann Friese · Leonberg, DE
Hans-Martin Wiedenmann · Stuttgart, DE
Frank Stanglmeier · Heubach, DE

Key dates

Filing date	Jan 19, 1996
Grant date	May 20, 1997
Priority date	—
Expiry date	Jan 19, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4075
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An electrochemical sensor for determining the oxygen concentration in gas mixtures is proposed. The sensor has a solid electrolyte (10) with oxygen ionic conductivity, which has a measuring electrode (11) that does not catalyze establishment of equilibrium of the gas mixture and is exposed to the gas mixture. The measuring electrode (11) contains platinum and bismuth. The effect of these materials is that the free oxygen contained in the gas mixture is preferentially adsorbed, without reacting with the other gas components such as CO and HC.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.