10Pcs 100VDC Wired Door Window Sensor Home Alarm System, Door & Window Alarm Magnetic Switch for Home Office Security, Iron Doors Unavailable

Price: $10.41
(as of Mar 18, 2024 12:49:34 UTC – Details)

Specifications:<,b>
Working Distance: 15mm + 5mm
Switching Pressure: 100VDC
Load current: 300 mA
Life: times
Switch Output: NC (Normally Closed)
Package Weight: 91g ,3.2oz

Package List:<,b>
10 Pair * Door Window Sensor

Close = short circuit = create a path for the current.
The magnets are close together and the switch is off. Not suitable for iron doors, it will reduce the magnetism of the sensor.
And the switch and magnet are separated, and the switch is open.
No external power supply is needed, and the GND and N.C ports of wired or wireless alarm control panel are directly connected.