Quartz resonator fluid density and viscosity monitor
First Claim
1. An apparatus for real-time in situ measurement of fluid density and viscosity comprising:
- a first resonator comprising a smooth surface;
a second resonator comprising a textured surface;
first measuring means connected to at least one of the first and second resonators for measuring density of a fluid disposed on said resonators; and
second measuring means connected to at least one of the first and second resonators for measuring viscosity of the fluid disposed on said resonators.
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Accused Products
Abstract
A pair of thickness-shear mode resonators, one smooth and one with a textured surface, allows fluid density and viscosity to be independently resolved. A textured surface, either randomly rough or regularly patterned, leads to trapping of liquid at the device surface. The synchronous motion of this trapped liquid with the oscillating device surface allows the device to weigh the liquid; this leads to an additional response that depends on liquid density. This additional response enables a pair of devices, one smooth and one textured, to independently resolve liquid density and viscosity; the difference in responses determines the density while the smooth device determines the density-viscosity product, and thus, the pair determines both density and viscosity.
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Citations
48 Claims
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1. An apparatus for real-time in situ measurement of fluid density and viscosity comprising:
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a first resonator comprising a smooth surface; a second resonator comprising a textured surface; first measuring means connected to at least one of the first and second resonators for measuring density of a fluid disposed on said resonators; and second measuring means connected to at least one of the first and second resonators for measuring viscosity of the fluid disposed on said resonators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for real-time in situ measurement of fluid density and viscosity, the method comprising the steps of:
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a) providing a first resonator comprising a smooth surface; b) providing a second resonator comprising a textured surface; c) measuring density of a fluid disposed on the resonators; and d) measuring viscosity of the fluid disposed on the resonators. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification