Sensor element for determination of concentration of substances

US5039490A · kind A · utility

Assignee

• AVL AG · CH

Inventors

• Hermann Marsoner · St. Johann in Tirol, AT
• Herbert Kroneis · Graz, AT
• Hellfried Karpf · Graz, AT
• Otto S. Wolfbeis · Regensburg, DE
• Helmut List · Graz, AT
• Alfred Leitner · Graz, AT

Key dates

• Filing date: Apr 17, 1987
• Grant date: Aug 13, 1991
• Expiry date: Apr 17, 2007

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/0622
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Due to the size of the devices used for the excitation and measuring of light, conventional sensor elements for optically determining the concentrations of substances contained in gaseous and liquid samples, featuring an indicator layer with one or more indicator substances, are not well suited for use with microanalysis equipment, nor are they easy to mass-produce. These disadvantages are eliminated by using a unitary sensor element having a carrier layer, at least one photosensitive element with electric contact leads in contact with the carrier layer, and an indicator layer containing an indicator substance.