1/5Pairs MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System


$9.9 $0.99

Disponibilité:
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  • Livraison estimée:May 26 - Jun 02

  • Expédition et retours gratuits: On all orders

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There are two types of reed switches: "normally open" reed switches and "normally closed" reed switches. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open.

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