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This uxcell magnetic reed switch is a simple but effective component for DIY alarm systems or security setups.
It's a normally closed (NC) contact sensor – meaning the circuit stays closed (conductive) when the magnet and switch are together, and opens (breaks the circuit) when they separate.
That makes it perfect for door or window monitoring where you want an alert when something opens.
The specs are straightforward: max current 0.




Mounting holes are 8x4mm with a 15mm spacing – standard size that's easy to screw down.




5 out of 5