Saybolt Universal viscosimeter

Saybolt Universal viscosimeter

[′sā‚bōlt ‚yü·nə′vər·səl ‚vis·kə′sim·əd·ər]
(engineering)
An instrument for measuring viscosity by the time it takes a fluid to flow through a calibrated tube; used for the lighter petroleum products and lubricating oils.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.