Process and apparatus for determining the concentration of a suspension
US3980884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A representative reading for the concentration of a suspension of luminous and magnetizable particles is provided in every case, even when luminous but non-magnetizable particles are also present. That is, the presence of non-magnetizable luminous particles in the suspension have no effect on the determination. A rotating wheel-like member has its lowermost portions immersed in a supply of the magnetic particle suspension in a fluid carrier. The circumferential periphery includes a permanent magnet having a gap extending continuously around the periphery and covered over by a plastic rim. As the wheel-like member rotates, the magnetic particle suspension forms a bead along the magnet gap. Ultra violet radiation directed onto the bead causes the magnetic particles to fluoresce and the degree of fluorescence is measured by photosensitive means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.