metalsensor
nounUK /ˈmɛtəl ˈsɛnsə/
US /ˈmɛtəl ˈsɛnsər/
A metal sensor is a tool that can tell when metal is near.
The metal sensor beeped when it found a coin in the sand.
OTHER MEANINGS
2. A device in a factory that checks whether metal parts are in the right place.
The metal sensor stopped the machine when a bolt was missing.
3. A part in a phone or toy that senses metal objects nearby.
The metal sensor in the toy robot made it turn around.
4. A security tool that finds hidden metal on people or in bags.
The metal sensor at the door beeped when the keys went through.