Patent · US Expired

Oxidizable gas component sensor and method of using the sensor

US6890422B1 · kind B1 · utility

1Cited by

3References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Frank Stanglmeier · Heubach, DE
Bernd Schumann · Rutesheim, DE
Thomas Moser · Schwieberdingen, DE

Key dates

Filing date	Mar 10, 2000
Grant date	May 10, 2005
Priority date	—
Expiry date	Mar 10, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/417
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An electrochemical gas sensor determining the concentration of oxidizable gas components which has an electrochemical measuring cell having a measuring electrode and a reference electrode. Measuring electrode is made of a material which is not able, or not completely able to catalyze the establishment of gas equilibrium. In addition to the electrochemical measuring cell, at least one electrochemical pumping cell, having at least one inner pumping electrode, is provided, which, together with measuring electrode, is positioned in a measuring gas compartment. Oxygen is pumped into or out of measuring gas compartment by pumping cell, the partial pressure of oxygen in measuring gas compartment being set to a lambda value of ≧1.3.

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