Electrical, hydraulic, or pneumatic device (such as a relay) that controls the flow of material or power. Also called actuation device.

Use actuator in a sentence

  • I liked to study machines and today I had a look at an interesting thing called an actuator, which I had never heard of.

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  • Having a good quality actuator running things will let you sleep a lot easier knowing it shouldn't cause any major problems.

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  • If you are working in a factory one of the most important pieces of equipment that you can have is your actuator.

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