Liquid quality monitor having a plurality of photodiodes for detecting light scattered at various angles
US4672216A · kind A · utility
7Cited by
9References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Oct 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/128
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A power station boiler condensate water monitor employs a light-scatter cell for the detection of oil and/or particulates in the water. In order to determine background scatter levels, provision is made to alternatively pass clean water through the cell (FLUSH). The offset voltages obtained from the detector outputs when clean water is employed are compensated for differences in temperature between the boiler condensate water and the clean water before substraction from the detector outputs when boiler condensate water is employed. The monitor is capable of detecting oil levels of less than 2 parts per million.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.