Method and apparatus for monitoring a gas or fine particles
US5427957A · kind A · utility
1Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/204998
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A carbon dioxide gas is supplied to a living plant while it is illuminated with excitation light, and resulting fluorescence from the plant is detected. Then, a mixture of a carbon dioxide gas and a gas or fine particles to be monitored is supplied to the same living plant while it is illuminated with the excitation light, and resulting fluorescence from the plant is detected. Differences between temporal variations or wavelength characteristics of fluorescence intensities under the above two conditions are used to identify the gas or fine particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.