Patent · US Expired

Sensor element for determining the oxygen content and a method of preparing the same

US4657736A · kind A · utility

50Cited by

8References

18Claims

0Family size

Assignee

AVL AG · CH

Inventors

Hermann Marsoner · St. Johann in Tirol, AT
Herbert Kroneis · Graz, AT
Otto S. Wolfbeis · Regensburg, DE

Key dates

Filing date	Jul 14, 1986
Grant date	Apr 14, 1987
Priority date	—
Expiry date	Jul 14, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T436/207497
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In an O.sub.2 sensor element which contains a fluorescent indicator substance, a polymerized silicone polymer is used as a carrier material in which the indicator substance is incorporated in solubilized form and in an at least approximately homogeneous distribution. Solubilization of the indicator substance may essentially be performed in analogy to Friedel-Crafts alkylation of aromatics, which will increase solubility of the indicator substance in the polymer carrier without affecting quenching behavior.

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