magneticcontact
nounUK /mæɡˈnɛtɪk ˈkɒntækt/
US /mæɡˈnɛtɪk ˈkɑːntækt/
A magnetic contact is a small switch that uses a magnet to open or close a door alarm.
The magnetic contact on the window tells the alarm when the window opens.
OTHER MEANINGS
2. A point where two magnetic parts touch to complete a circuit.
The engineer checked the magnetic contact inside the motor.
3. A connection made through a magnetic force rather than a wire.
The charger uses a magnetic contact to attach to the device.
4. A sensor that detects when a magnet moves away from it.
The security system logged the magnetic contact when the gate opened.