How does an actuator differ from a cylinder in a pneumatic system?

An actuator encompasses any device that converts energy into motion, while a cylinder specifically uses compressed air. This distinction is crucial because the term "actuator" is broader and refers to any mechanism that converts various forms of energy (like electrical, hydraulic, or pneumatic) into mechanical motion or action. In contrast, a cylinder is a specific type of actuator that operates by the movement of a piston within a cylindrical chamber using compressed air as its source of power.

This means that while all cylinders can be considered actuators in the context of a pneumatic system, not all actuators are cylinders since they can utilize different principles of operation and energy sources. This understanding is fundamental in the field of pneumatics, as it allows for a clearer differentiation between the types of motion-generating devices and their applications.