Device for measuring the modification time of the physical state of a fluid medium
US5072610A · kind A · utility
17Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1991 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Mar 27, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for the measurement of time at which the physical state of a fluid medium is modified, comprises a vertical cup which contains the fluid and the necessary reagents, and in which a ferromagnetic ball is placed and is driven in rotation by an external magnetic field. The cup has at its lower part an annular travel path for the ball and it comprises a detection device which delivers an electric signal whenever the ball passes in front of it which is associated with a measurement unit determining the variation of the time interval between two consecutive passages of the ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.