What device is used to measure viscosity?

A viscometer is specifically designed to measure the viscosity of fluids, providing critical information about a fluid's resistance to flow. Viscosity is an important property in various industries, including food, pharmaceuticals, and chemical processing, as it impacts how substances behave when mixed with others or how they move through pipes and machinery.

Thermometers measure temperature, which, while it can influence viscosity, does not assess it directly. Hydrometers are used to measure the density of liquids based on buoyancy principles, while barometers measure atmospheric pressure. Each of these devices serves distinct functions unrelated to the direct measurement of viscosity, highlighting the specialized nature of the viscometer for this specific task.