System and method for measuring aerosol or trace species
US9709491B1 · kind B1 · utility
6Cited by
24References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2016 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Apr 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/391
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of the present invention relates to a system for measuring trace species in a sample gas. The present invention uses an open-path configuration including an optical cell with mirrors at each end, a long slotted rod with holes in the end for an optical bean to pass through, and a slotted tube surrounding the slotted rod such that air can pass through the rod in a transverse direction when the slots are aligned. Embodiments of the present invention further includes a flow configuration for purging sample gas from the optical cell, and cleaning mirrors, with calibrated or zero air through inlets in front of each mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.