Viscosity maintenance

Details Viscosity maintenance Viscosity maintenance

1996-03-08

1997-10-14

Williams, Hezron E.

Measuring and testing

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

Viscosity

73 5401, 137 92, 347 17, G01N 1114, G01N 1100, G05D 1100, B41J 2938

Patent

active

056774818

ABSTRACT:
A device for measuring relative viscosity includes a fluid reservoir, a stirrer, and a sensing system. The stirrer has two members, with one member being more bendable than the other. When the stirrer is moving, the sensing system detects a differential bend between the members; the differential bend is related to the viscosity of a fluid in the fluid reservoir. The sensing system includes two spaced sensors which detect when magnets on the members pass the sensors. A timer provides a time lapsed between passage of one of the members past a sensor and passage of the other member past the other sensor. The time lapsed is related to the viscosity of the fluid in the fluid reservoir. A controller automatically controls the addition of a solvent to the fluid within the fluid reservoir; the addition of the solvent is dependent on the time lapsed.

REFERENCES:
patent: 3677070 (1972-07-01), Norcross
patent: 4499753 (1985-02-01), Carr
patent: 4668911 (1987-05-01), Mueller et al.
patent: 4878378 (1989-11-01), Harada
patent: 5131265 (1992-07-01), Tobin et al.
Knopf, M., "Use Torque Sensors in Small Mixers to Measure Viscosity," Today's Chemist At Work, Dec., 1994.

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