Sensor element for determination of concentration of substances

US5157262A · kind A · utility

Assignee

• AVL Medical Instruments · 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: May 28, 1991
• Grant date: Oct 20, 1992
• Expiry date: May 28, 2011

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 integrating on the carrier layer (1) at least one photosensitive element (3) and its electric contact leads in planar arrangement, and by establishing optical contact between the indicator substance (7, 7') of the indicator layer (6) stimulated by the excitation radiation (11), and the photosensitive elements (3).