Smoke meter
US5353629A · kind A · utility
2Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1992 |
| Grant date | Oct 11, 1994 |
| Priority date | — |
| Expiry date | Jul 1, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/151
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A smoke meter is particularly adapted to meter the smoke content of vehicle exhaust gases. The meter includes a measuring tube with a light at one end and a light detector at the other end, the amount of light detected corresponding to the smoke content. The optical surfaces are kept clean by inducing a flow of clean air across the surfaces using an air supply which also induces flow of gas into the measuring tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.