Sensor membrane of an optical sensor
US6139798A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1997 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Apr 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/207497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The sensor membrane of an optical sensor for detection of O.sub.2, H.sub.2 O.sub.2, SO.sub.2 or halogenated hydrocarbons in a sample contains an indicator substance that is homogeneously immobilized in the polymer matrix of the sensor membrane and is, at least indirectly, in contact with the sample, changing at least one of its optical properties upon a change of the parameter to be measured. The indicator substance contains an inorganic salt of a transition metal complex with .alpha.-diimine ligands. The indicator substance is homogeneously distributed in the polymer matrix, which essentially consists of at least one substance belonging to the group of cellulose derivatives, polystyrenes, polytetrahydrofuranes, or their respective derivatives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.