Patent · US Expired

Sensor element for determination of concentration of substances

US4755667A · kind A · utility

56Cited by

3References

18Claims

0Family size

Assignee

AVL AG · CH

Inventors

Hermann Marsoner · St. Johann in Tirol, AT
Hellfried Karpf · Graz, AT
Alfred Leitner · Graz, AT

Key dates

Filing date	Apr 17, 1987
Grant date	Jul 5, 1988
Priority date	—
Expiry date	Apr 17, 2007

Classification

Technology area (CPC G)Physics
CPC primaryG01N2201/0622
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A sensor element for use in determining the concentrations of substances contained in gaseous and liquid samples includes a carrier layer and an indicator layer containing one or more indicator substances whose optical properties change depending on the concentration of the substances to be measured, the carrier layer being provided with at least one photosensitive element with electrical contacts in planar arrangement, the indicator layer acting as a waveguide for excitation radiation coupled therein by an optical element.

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