Title:
MICRO SLIT VISCOMETER WITH MONOLITHICALLY INTEGRATED PRESSURE SESONRS
Document Type and Number:
WIPO Patent Application WO2005086883
Kind Code:
A3
Abstract:
An improved micro slit viscometer includes a combined micrometer depth rectangular slit flow channel (22) with monolithically integrated multiple pressure sensors in the flow channels and a pumping system that injects a test sample to the channel at a desired flow rate. Pressure sensing diaphragm (31) of the monolithically integrated pressure sensors (26) is smooth to minimize the flow disturbance thereby measuring accurate local pressures. With the measurement of the pressures at various locations of the channel the true viscosity of test sample can be calculated. The viscometer may consist of multiple flow channels and thus the true viscosity at multiple shear rates can be measured simultaneously for a given flow rate thereby obtaining a full viscosity curve as a function of shear rate of non-Newtonian liquids in a much faster manner.
Inventors:
BAEK SEONG-GI (US)
Application Number:
PCT/US2005/007869
Publication Date:
November 23, 2006
Filing Date:
March 11, 2005
Export Citation:
Assignee:
RHEOSENSE INC (US)
BAEK SEONG-GI (US)
BAEK SEONG-GI (US)
International Classes:
G01L13/02; G01N11/08
Domestic Patent References:
| WO1999026048A1 | 1999-05-27 |
Foreign References:
| US20030079547A1 | 2003-05-01 | |||
| US5983727A | 1999-11-16 | |||
| US5485753A | 1996-01-23 | |||
| US4241602A | 1980-12-30 |
Other References:
See also references of EP 1754036A4
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