Stackable differential mobility analyzer for aerosol measurement
US7213476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Nov 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0266
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-stage differential mobility analyzer (MDMA) for aerosol measurements includes a first electrode or grid including at least one inlet or injection slit for receiving an aerosol including charged particles for analysis. A second electrode or grid is spaced apart from the first electrode. The second electrode has at least one sampling outlet disposed at a plurality different distances along its length. A volume between the first and the second electrode or grid between the inlet or injection slit and a distal one of the plurality of sampling outlets forms a classifying region, the first and second electrodes for charging to suitable potentials to create an electric field within the classifying region. At least one inlet or injection slit in the second electrode receives a sheath gas flow into an upstream end of the classifying region, wherein each sampling outlet functions as an independent DMA stage and classifies different size ranges of charged particles based on electric mobility simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.