Humidity conditioning for water-based condensational growth of ultrafine particles
US11237091B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Nov 1, 2019 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Dec 30, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0681
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particle growth apparatus includes a temperature-controlled humidifier coupled to a water-based condensation growth system. The humidifier may include a tube of sulfonated tetrafluoroethylene-based fluoropolymer-copolymer and surrounded by a region containing water or water vapor. The apparatus includes a wetted wick and wick sensor in the condensation growth system, configured such that the gas sample flows through the sulfonated tetrafluoroethylene-based fluoropolymer-copolymer tube into the condensation growth system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.