Chemiluminescence type nitrogen oxide concentration meter
US11162926B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 2019 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a chemiluminescence type nitrogen oxide concentration meter, a mixed gas of air with its moisture adsorbed by an adsorption apparatus and air that through a fifth flow path without the adsorption apparatus in between is flown into an ozone generator. Therefore, ozone can be generated using air of proper humidity in the ozone generator 7. As a result, ozone can be efficiently generated while suppressing occurrence of metal contamination in the ozone generator 7. Then, in the reaction unit 8, nitrogen oxides in the sample gas are made to appropriately show chemiluminescence using the ozone, and in the detector 9, the intensity of light generated in the reaction unit 8 is detected. Furthermore, in the control unit 10, the concentration of nitrogen oxides in the sample gas is measured, based on the intensity of light detected by the detector 9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.