Back to results
US 6,602,470 B2Granted
Optical sensor and method for producing same
AssigneeRobert Bosch GmbH
InventorsBernd Siber, Thomas Brinz, Heidrun Potthast, Andreas Hensel
Life of this patent
Estimating the term…
Abstract
An optical sensor is described for determining the concentration of a gas in gas mixtures, which can especially be used for determining the carbon monoxide content of the air. It includes a radiation source, a sensitive layer positioned on a translucent substrate, and a detector. The sensitive layer of the sensor contains a transition metal compound which forms a transition metal complex with the gas to be determined.
Claims15
An optical sensor for determining a concentration of a gas in a gas mixture, comprising:
- a radiation source;
- a detector;
- a translucent substrate arranged between the radiation source and the detector;
- and
- a sensitive layer positioned on the translucent substrate and containing a transition metal compound that forms a transition metal complex with the gas, the sensitive layer including a material capable of causing the sensitive layer to change color.
2 more elements
A method, comprising:
- producing a sensitive layer in the form of a thin film by applying a solution of hydrogel, a softening agent, and metal salts to a translucent substrate and by performing a subsequent drying process, in order to produce a sensor that includes:
- the translucent substrate, and
- the sensitive layer positioned on the translucent substrate and containing a transition metal compound that forms a transition metal complex with a gas, the sensitive layer including a material capable of causing the sensitive layer to change color.
Dependencies are inferred from the claim text.