10 Pairs Magnetic Reed Switch Sensors for Home Security Alarm - Wired Door Windo
$31.99
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10 Pairs Wired Magnetic Reed Switch Sensors for Home Security Alarm - Invisible
$31.99
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About this item
The switch remains closed (conductive/short circuit) when the door is closed (magnet near sensor) and opens (circuit broken) when the door is opened (magnet removed). Perfect for large residential projects, office fit-outs, or keeping spares on hand for future maintenance.
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