Viscometry is a sub-set of rheometry, devoted to measuring only the viscosity of a fluid. Understanding these rheological properties helps users predict how a material will process as well as perform in its end use. The applications are diverse, ranging from studying the texture and flow of foods to measuring the stiffness and stability of high-strength composites. Besides making and selling rheometers and viscometers for laboratory use, Rheometric Scientific offers rheometers for in-line process control of plastics and foods. The third technology in which Rheometric Scientific derives its business is thermal analysis .
Thermal analysis is the science that measures the effects of thermal changes on materials.