Method for determining identification and concentration of an atmospheric component
US5080765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and method for determining the identity and concentration of one or more components in a test atmosphere having a known concentration of oxygen. A solid electrolyte oxygen sensor is used, having a first solid electrolyte wall in contact with, and interposed between, a first electrode and a second electrode and a second solid electrolyte wall in contact with, and interposed between a third electrode and a fourth electrode. The second and fourth electrodes are in communication with the test atmosphere. A partition wall separates the first and third electrodes forming a first chamber bounded by the first wall and the partition wall and a second chamber bounded by the partition wall and the second wall. Diffusion limiting means inhibit gas-flow of the gas from the test atmosphere to the first chamber and from the first chamber to the second chamber. A first negative voltage (or positive voltage when the unknown component has a concentraion larger than that of a stoichiometric gas mixture) is applied to the first and second electrodes generating a first electrical current on a first electric current plateau. Simultaneously the EMF across the third and fourth electrodes is meas…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.