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Viscometer for low frequency, low shear rate measurements



Robert F. Berg, Michael R. Moldover


We describe a torsion-oscillator viscometer whose low frequency ( 0.5 Hz) and very low shear rate (0.05 s-1) are required for measurements of shear sensitive fluids such as microemulsions, polymer melts and solutions gels, and liquid mixtures near critical points. The viscometer has a resolution of 0.2% when used with liquid samples and a resolution of 0.4% when used with a dense gaseous sample. The viscometer operates under computer control and is compatible with submillikelvin temperature control.
Review of Scientific Instruments


Berg, R. and Moldover, M. (1986), Viscometer for low frequency, low shear rate measurements, Review of Scientific Instruments (Accessed May 19, 2024)


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Created August 1, 1986, Updated February 19, 2017