Sensor element for determination of concentration of substances
First Claim
1. A sensor element for determining the concentrations of substances contained in gaseous and liquid samples, comprising a carrier layer and an indicator layer, comprising one or more indicator substances, at least one of the optical properties of said indicator substances will change upon interaction with said substance to be measured, depending on the concentration of said substance, wherein said carrier layer is provided with at least one photosensitive element and electrical contacts of said photosensitive element in planar arrangement, wherein said indicator layer containing said indicator substance is acting as a waveguide for excitation radiation, said excitation radiation can be coupled into said indicator layer by means of an optical element, and wherein said indicator substance excited by said excitation radiation is in optical contact with said photosensitive element.
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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.
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18 Claims
- 1. A sensor element for determining the concentrations of substances contained in gaseous and liquid samples, comprising a carrier layer and an indicator layer, comprising one or more indicator substances, at least one of the optical properties of said indicator substances will change upon interaction with said substance to be measured, depending on the concentration of said substance, wherein said carrier layer is provided with at least one photosensitive element and electrical contacts of said photosensitive element in planar arrangement, wherein said indicator layer containing said indicator substance is acting as a waveguide for excitation radiation, said excitation radiation can be coupled into said indicator layer by means of an optical element, and wherein said indicator substance excited by said excitation radiation is in optical contact with said photosensitive element.
Specification