Patent · US Active

Sensor element for determining a physical property of a measuring gas

US7943025B2 · kind B2 · utility

2Cited by

1References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Christian Ohly · Weil der Stadt, DE
Walter Strassner · Schorndorf, DE
Joachim Graeber · Heilbronn, DE
Ulrich Eisele · Stuttgart, DE
Lothar Diehl · Stuttgart, DE
Thomas Seiler · Stuttgart, DE

Key dates

Filing date	May 30, 2008
Grant date	May 17, 2011
Priority date	—
Expiry date	Jun 2, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4072
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor element is provided for determining a physical property of a measuring gas, especially of the concentration of at least one gas component in the measuring gas, which has at least one ceramic layer, a diffusion barrier adjoining the at least one ceramic layer and at least one electrode that is exposed to the measuring gas diffusing through the diffusion barrier. In order to reduce the production variations with respect to the static pressure dependence and the limiting current of the diffusion barrier), the proportions of silicon in the diffusion barrier and in the at least one ceramic layer are approximately equal and differ by not more than 1 wt. %.

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