Sensor
US8487240B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2010 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Apr 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and sensor for monitoring chemical species in a gas flow are described. An ionized sample of gas is passed through a flow channel, with a DC electric field applied transverse to the longitudinal axis of the channel. Any electric current produced by the ion flow is measured, with variations in the current being indicative of a change in composition of the gas flow. In certain embodiments, the DC field may be varied over time, to sweep the field voltage. The detected current against field voltage graph may be taken as a profile of a particular gas composition. Variations in the profile again are indicative of a change in gas composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.