GAGALOR 2-Set NO/NC Magnetic Switch Door Contact Sensor – Surface Mounted Reed Switch With Over 1/2" Operation Distance

About This Product

This GAGALOR 2-set magnetic door contact sensor is a simple but effective security component for doors, windows, cabinets, or anything that opens and closes.

Each set includes a magnet and a reed switch sensor that can be wired as Normally Open (NO) or Normally Closed (NC), depending on what your alarm or control system needs.
The operation distance is more than 1/2 inch, which gives you a little wiggle room for alignment without being too sensitive to slight vibrations or drafts.

Surface mounting makes installation quick and painless—no need to recess into the door frame or drill big holes.

Just screw or stick them in place, run your wires, and you're set.
The small dimensions keep them discreet, and they work with most standard alarm panels, home automation systems, or simple relay circuits.

High-quality reed switch internals give them a long life with reliable actuation each time.

Great for DIY security systems, automated lighting triggers, or any project that needs to detect when a door or window is opened or closed.
Simple, low-cost, and effective.