magnetic field sensor
nounUK /mæɡˈnetɪk fiːld ˈsensə/
US /mæɡˈnetɪk fiːld ˈsɛnsər/
A small tool that feels magnets and magnetic fields around it.
The magnetic field sensor in the phone tells the compass which way is north.
OTHER MEANINGS
2. A device in a smartphone that helps apps know the phone's direction.
The map app uses the magnetic field sensor to show which way you are facing.
3. A scientific instrument used to measure the strength and direction of magnetic fields.
Scientists used a magnetic field sensor to study the field around the volcano.
4. A part in machines that detects magnets to control movement or position.
The robot's arm stopped when its magnetic field sensor touched the metal plate.