ABSTRACT
To begin, note that a viscosity-measuring instrument may be called a viscometer, viscosimeter, or rheometer; all these names are used in the technical literature and manufacturers’ publications. Most of the material covered in measurement texts focuses on individual sensors for measuring some specifi c quantity such as pressure, temperature, velocity, etc. There are however many “instruments” that might use a combination of sensors and other apparatus to measure some physical quantity of interest. One category of this type would be instruments intended to determine some physical property of a solid or fl uid material, such as tensile strength, density, thermal conductivity, etc. Such information is vital when we do theoretical calculations that involve that material. In this chapter, you will be familiarized with certain instruments used to measure the viscosity of liquids.
