System and method for determining a concentration of gas in a confined space
US9448186B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 2011 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Feb 5, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for determining a concentration of gas in a confined space includes a first frequency generator for generating a first RF signal. A first antenna transmits the first RF signal across the confined space and second antenna receives the first RF signal. First and second RF signal power detectors detect the power of the first RF signal both prior to and after transmission through the confined space. A first comparator circuit determines a concentration of oxygen in the confined space based on the power of the first RF signal prior to transmission through the confined space and the power of the first RF signal received by the second antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.