distance sensor
nounUK /ˈdɪstəns ˈsɛnsə/
US /ˈdɪstəns ˈsɛnsər/
A distance sensor is a small tool that tells you how far away something is.
The robot used a distance sensor to stop before hitting the wall.
OTHER MEANINGS
2. A device in a car that warns you when you are too close to another car or object.
The car's distance sensor beeped when the truck got too close.
3. A part in a phone or camera that helps it focus on things at different distances.
The phone's distance sensor helped the camera focus on the flower.
4. A tool used in factories to check how far a machine part has moved.
The factory arm uses a distance sensor to place each box in the right spot.