What best describes a pneumatic actuator?

A pneumatic actuator is defined as a device that utilizes compressed air to generate mechanical motion. Pneumatic systems rely on the principles of fluid dynamics, where compressed air expands and moves through various channels, creating motion in the actuator. This mechanical movement can be linear or rotary and is instrumental in applications where precise control is required, such as in automated machinery, robotics, or any mechanical system that requires movement without electrical components.

The significance of pneumatic actuators lies in their ability to provide powerful, controllable motion while benefiting from the cleanliness and safety that compressed air offers compared to hydraulic or electrical systems. Pneumatic actuators are also known for their speed and efficiency in performing tasks, making them ideal for various industrial applications where rapid response times are crucial.