Apparatus for measuring foreign substance content in flowing liquids
US4931660A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1987 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Dec 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/1751
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an apparatus for determining the concentration of foreign substances in a stream of water, a liquid stream is derived from lines preceding and following the pipeline block for the process and each is pumped into a cell, a radiation source being associated with each of the cells, whose beams penetrate the cells and are delivered both to a first detector and to a second detector. A beam filter is placed in front of each of the detectors and divides the beams into two beams of different wavelengths. Between the beam source and the two cells a revolving chopper wheel is disposed which alternately deflects the beams of the radiation source into one and the other cell, while the electrical signals of the detectors are compared with one another by an electrical circuit and processed to an identifying signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.