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 concentric cylindrical rotor consists of an inner cylinder and an outer cylinder, with a large contact surface area and high stress sensitivity. It is mainly used to measure uniform samples with medium to low viscosity and easy cleaning, and is generally not suitable for high viscosity samples, pastes, and suspensions containing large particles.