A viscometer, or a viscosity meter, is an analytical instrument used to measure the internal flow resistance, or viscosity, of a fluid. While typically used within the laboratory, viscometers can be important components in process and quality control applications for industries producing materials such as oil, wax, coatings, adhesives, plastics, asphalt, and much more. Viscometers function by moving the liquid either through or past a stationary material using a sphere or rotor blade, allowing for the liquid’s resistance to flow to be measured. Some types of viscometers include capillary, rotational, or sphere viscometers.

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