Device for measuring viscosity and/or density

Details Device for measuring viscosity and/or density Device for measuring viscosity and/or density

2005-09-06

2005-09-06

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

C073S054240, C073S054250, C073S054260, C073S054270, C073S054410, C073S03200R, C073S579000

Reexamination Certificate

active

06938462

ABSTRACT:
A device for measuring the viscosity and/or the density of a fluid using a resonator capable of mechanical vibrations. The resonator is capable of being brought into contact with the fluid. An oscillator circuit is also provided, wherein the oscillator circuit has a first feedback network and a second feedback network.

REFERENCES:
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patent: 198 50 803 (2000-05-01), None
patent: WO 00/25 118 (2000-05-01), None
Barnes, C., “Development of Quartz Crystal Oscillators for Under-Liquid Sensing”, Sensors and Actuators A, Elsevier Sequoia S.A., Lausanne, Ch., vol. A29, No. 1, Sep. 1, 1991, pp. 59-59.
Chagnard, C. et al., “An Electronic Oscillator with Automatic Gain Control: EQCM Applications”, Sensors and Actuators B, Elsevier Sequoia S.A., Lausanne, CH, vol. B32, No. 2, May 1, 1996, pp. 129-136.

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