High viscosity transducer for vibratory viscometer

Details High viscosity transducer for vibratory viscometer High viscosity transducer for vibratory viscometer

1992-04-28

1994-06-07

Williams, Hezron E.

Measuring and testing

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

Viscosity

73 5425, G01N 1106

Patent

active

053179080

ABSTRACT:
A transducer for inline process control of highly viscous fluids at high pressure and high temperature having a torsionally oscillating sensor tip supported by a pressure resistant threaded body portion. The sensor tip, which includes a thermocouple to measure fluid temperature, is driven by a crossarm which oscillates with a constant angular amplitude, the power required to maintain that amplitude despite the viscous resistance offered by the fluid being a measure of the viscosity-density product of the fluid. The crossarm driver and detector electromagnetic coils are oriented at right angles to each other to reduce crosstalk and transducer housing diameter. The associated electronic control unit includes means to compensate for the effects of fluid flow rate and fluid pressure which were found to be encountered with the vibratory viscometer method of measurement when inline measurements are made on high viscosity fluids.

REFERENCES:
patent: 3382706 (1968-05-01), Fitzgerald
patent: 4488427 (1984-12-01), Matusik et al.
patent: 4566188 (1986-01-01), Matusik et al.
patent: 4754640 (1988-07-01), Fitzgerald et al.
patent: 5054313 (1991-10-01), Fitzgerald et al.

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