End of service life indicator for organic vapor respirator filter cartridge
US8859995B2 · kind B2 · utility
16Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Mar 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/7786
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments generally relate to detection of end of service life for respirator filter cartridges for organic vapor(s). Typically, detection of end of service life might use a competitive UV absorbance-fluorescence approach. Thus, a sensor that emits light upon application of UV may be placed within the cartridge, with a UV lamp and a light detector directed at the sensor. In some embodiments, a plurality of corresponding sensor and UV lamp and light detector might be used. Typically, the light level emitted by the sensor(s) might be used to estimate effective end of service life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.