Saybolt Furol viscosimeter

Saybolt Furol viscosimeter

[′sā‚bōlt ′fyu̇‚rȯl ‚vis·kə′sim·əd·ər]
(engineering)
An instrument for measuring viscosity of very thick fluids, for example, heavy oils; similar to the Saybolt Universal viscosimeter, but with a larger-diameter tube so that the efflux time is about one-tenth that of the Universal instrument.
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