hallsensor
nounUK /ˈhɔːl sɛnsə/
US /ˈhɔl sɛnsər/
A hall sensor is a tiny part that tells a machine when a magnet is near.
The hall sensor in the bike wheel counts each turn so the speedometer works.
OTHER MEANINGS
2. A device that uses the Hall effect to measure the strength of a magnetic field.
Engineers used a hall sensor to check the magnet's strength.
3. A contactless position detector found in motors and phones.
The phone's hall sensor knows when the flip cover is closed.
4. A small electronic component that turns magnetic changes into electrical signals.
The robot's arm uses a hall sensor to know its angle.