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5 Pack NC Magnetic Switch Contacts Door Sensor for Home Alarm Security System

5 Pack NC Magnetic Switch Contacts Door Sensor for Home Alarm Security System

$16.54
  • Condition: New
  • Ships from: US
  • Seller: stsh-8905 (96.2% 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. Great for use in family and factory window, door, etc.

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