Density and viscosity sensor
US7874199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2006 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Feb 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A density and viscosity sensor for measuring density and viscosity of a fluid, and method for measuring, are presented herein. The sensor comprises a resonating element, and actuating/detecting element, a connector and a housing. The actuating/detecting element is positioned within a chamber defined by the housing so as to be isolated from the fluid. The resonating element is arranged to be immersed in the fluid, and has a shape defining a first resonance mode and a second resonance mode characterized by different resonance frequencies and different quality factors. The first resonance mode is adapted to move a volume of fluid, and the second resonance mode is adapted to shear a surrounding fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.