A rotational rheometer generally consists of four parts: a measuring head, a temperature control system, a rotor system, and a data acquisition and processing system. The rotor system is an important component of the rotational rheometer, and the selection of the rotor is crucial for practical applications.

The cone plate rotor and the parallel plate rotor are very similar in structure and purpose. The flat cone plate rotor has different sizes and taper angles to choose from, and the applicable rotor can be calculated according to the corresponding formula, or selected according to the standards or testing requirements followed.