5 Sets Recessed Wired Magnet Reed Switch Window Door Magnetic Contact Sensor Alarm White

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Features: N. C. Magnet Door Contact Sensor. Work as an anti-theft alarm, ideal for metal door and window. The reed switch is an electrical switch operated by an applied magnetic field. It is between 5/8" & 3/4". The hole will have to be enlarged if drilling with a 5/8" bit.
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 ).
Specification:
Color: White
Housing Material: ABS
Maximum Current: 0.5A
Voltage: 100V
Rated Power: 10W
Contacts Status: NC
Operating Distance: ~12mm
Cable Length: 25.4 cm/10"
Size: 17 x 11mm / 0.67" x 0.43" (H*D)