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20 Sets Wired Magnetic Door Window Alarm Contact Sensor - Security Reed Switch

20 Sets Wired Magnetic Door Window Alarm Contact Sensor - Security Reed Switch

$49.99
  • Condition: New
  • Ships from: Perrysburg, US
  • Seller: bowesales (98.9% positive)
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About this item

Operation Principle: Features a normally closed (NC) design; when the magnet is close to the switch, the signal is conductive. If the magnet moves away, the signal disconnects—ideal for alarms, LED lights, door openers, and more.

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