10pcs RC-33 NC Recessed Wired Window Door Contact Sensor Alarm Magnetic Reed Switch White
- RC-33 NC Recessed Wired Window Door Contact Sensor Alarm Magnetic Reed Switch.
- Magnet near together, the switch is closed.And the switch and magnet is separate, the switch is open..
- NC means Normally Closed: When the magnet together, the circuit is conductive( light on ).
- when the magnet separate, the circuit is not conductive ( light off )..
- NC means Normally Closed:When the magnet together, the circuit is conductive( light on ).
- Each Size(Approx): 17 x 10.6mm / 0.67 x 0.42-inch (H*D) Cable Length(Each): 25cm / 9.8-inch.