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5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm

5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm

$11.99
  • Condition: New
  • Ships from: Brooklyn, US
  • Seller: 7729c82 (97.6% positive)
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About this item

It consist of a reed switch part and a magnet part. When door closed, reed switch is effected by magnet and turn ON; when door open, reed switch is effected by magnet and turn OFF, trigger alarm. Application: door / window entry burglar alarm system.

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