Apparatus for measuring foreign substance content in a flowing liquid
US4900152A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/054
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an apparatus for determining the concentration of foreign matter in a water stream, a stream of liquid is bypassed through conduits both before and after the pipeline block for the process and each stream is pumped into a cell, a beam source being associated with each of the cells whose beams penetrate the cells and are led by a beam splitter both to a first detector and to a second detector, the electrical signals of the detectors being compared by an electrical circuit and processed to a recognition signal. To make a bubble-free sample stream possible, magnetically actuated valves are inserted into the return lines which are connected to the cells, and the signals for opening and closing the valves are produced by a frequency generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.