Quartz resonator fluid density and viscosity monitor

Patent · Wed Dec 31 23:00:00 EST 1997

OSTI ID:871487

Martin, Stephen J ^[1]; Wiczer, James J ^[1]; Cernosek, Richard W ^[1]; Frye, Gregory C ^[2]; Gebert, Charles T ^[1]; Casaus, Leonard ^[3]; Mitchell, Mary A ^[4]

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1. Albuquerque, NM
2. Cedar Crest, NM
3. Bernalillo, NM
4. Tijeras, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 5741961
• OSTI ID: 871487
• Country of Publication: United States
• Language: English

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/73/
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allows
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independently
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mode
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weigh