Gas-in-oil monitoring apparatus and method
US4890478A · kind A · utility
21Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1987 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Sep 11, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0031
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An on-line gas-in-oil monitoring apparatus and method extracts certain reducing or combustible gases from oil and detects their presence and concentration substantially simultaneously using a sensor. The sensors are sintered metal oxide semi-conductors with adsorbed oxygen. The presence of a reducing or combustible gas proportionally increases the conductivity of the semi-conductor. Any resultant change in conductivity indicates the presence and concentraton of the reducing or combustible gas in the semi-conductor. After the analytical cycle the sensors are regenerated by exposure to oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.