Measuring and testing – Specific gravity or density of liquid or solid
Patent
1993-08-18
1998-04-21
Williams, Hezron E.
Measuring and testing
Specific gravity or density of liquid or solid
G01N 900
Patent
active
057419612
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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Stephen J. Martin, et al., "Characterization of a Quartz Crystall Microbalance with Simultaneous Mass and Liquid Loading," Analytical Chemistry, Vol. 63, No. 20, pp. 2272-2281 (1991).
Casaus Leonard
Cernosek Richard W.
Frye Gregory C.
Gebert Charles T.
Martin Stephen J.
Oda Christine K.
Sandia Corporation
Williams Hezron E.
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