Apparatus and method for the determination of the relative proportions of gases
US6202468A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Jan 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02809
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method of determining the relative proportions of gases in a mixture, such that the relative proportions of N gases are determined using N-1 sensors, not all of which are specific to a particular gas. In the preferred embodiment, oxygen and carbon dioxide are measured in the presence of nitrogen by measuring magnetic susceptibility and speed of sound. The described method of gas analysis leads to very fast response times and exceptional stability, making the technology suitable for breath-by-breath analysis of respired air. Notably, the method does not require high-temperature components, electrochemical cells, or consumable components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.