Temperature compensated density viscosity sensor having a resonant sensing element
US10502670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2016 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Sep 21, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02818
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid density measurement device that includes a housing, defining a chamber and an aperture; a resonator having length that is at least 5 times greater than its smallest diameter and having a longitudinal axis and a nodal plane, transverse to the longitudinal axis. The resonator further includes a tube having a first end and a second end; a second-end closure, closing the second end; and a drive rod centrally attached to the second-end closure and extending to the tube first end. Further, the device includes a resonator transducer assembly and the resonator is sealingly joined to the aperture at the nodal plane, so that an enclosed portion extends into the chamber and an exposed portion extends outside of the chamber, and wherein the chamber tends to assume the temperature of the exposed resonator portion, causing the resonator to be isothermal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.