Gas detectors
US4173886A · kind A · utility
29Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0011
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to portable gas detectors having means for aspirating a sample of the atmosphere to be tested into the vicinity of two sensor devices, and including a water-trap comprising valve means arranged, in response to a drop in pressure in the flow line when water is accidentally sucked in with an aspirated sample, to temporarily close the sample flow path or to open a by-pass for detecting the presence of both natural gas and manufactured gas in the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.