Sensing apparatus and method
US8892399B2 · kind B2 · utility
2Cited by
21References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jul 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B17/113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting one or more blocked sampling holes in a pipe of an aspirated smoke detector system. The method includes ascertaining the base flow of fluid through a particle detector using a flow sensor; monitoring subsequent flow through the particle detector; comparing the subsequent flow with the base flow; and indicating a fault if the difference between the base flow and the subsequent flow exceeds a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.