Viscometer

Details Viscometer Viscometer

1988-06-07

1989-09-12

Levy, Stewart J.

Measuring and testing

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

Viscosity

73 54, G01N 1112

Patent

active

048648493

ABSTRACT:
A viscometer (10) includes a chamber-defining cylinder (22) within which a bob (26), including a ferromagnetic collar (30), is shuttled back and forth by alternate driving of two coils (32 and 34). Measurement circuitry (FIG. 2) determines the viscosity of fluid inside the chamber (24) by measuring the time required for the bob (26) to make a round trip consisting of one stroke in each direction. By employing round-trip time rather than single-stroke time, the viscometer (10) reduces the sensitivity of the viscosity measurement to orientation with respect to gravity.

REFERENCES:
patent: 3677070 (1972-07-01), Norcross
patent: 4627272 (1986-12-01), Wright

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