Gas concentration-detecting device for detecting concentration of gas in oil
US6585938B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Aug 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2841
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is provided a gas concentration-detecting device for detecting the concentration of gas in oil, which is capable of detecting the concentration of gas in oil with accuracy, irrespective of the temperature of oil, and even when oil is degraded. The gas concentration-detecting device includes two electrodes for being arranged in the oil such that the electrodes are opposed to each other and spaced from each other by a predetermined distance, and a capacitance amplifier for outputting a signal indicative of a concentration of gas in oil, the signal being dependent on a capacitance between the electrodes. The predetermined distance between the electrodes is set to a value equal to or larger than a predetermined value at which an amount of drift of the signal output from the capacitance amplifier dependent on variation in a temperature of the oil starts to gradually decrease as the distance between the electrodes is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.