Method for determining the oxygen content in gases, uninfluenced by temperature variations
US4394222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1980 |
| Grant date | Jul 19, 1983 |
| Priority date | — |
| Expiry date | Nov 19, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4175
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Determining the oxygen content in gases, particularly combustion exhaust gases, uninfluenced by temperature variations of the gases by passing the gases into a first electrical measuring cell having a solid electrolyte and electrodes connected to a current source. A diffusion-limited electric current flow dependent on the oxygen content of the gases is obtained and measured as a first electrical signal. Passing an auxiliary gas with constant oxygen content into a second measuring cell similar to the first cell and under the same conditions and obtaining a second electrical signal. The quotient of the two electrical signals is a measure of the oxygen content of the gases uninfluenced by temperature variations of the gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.