SM-226L-3Q Seco-Larm Overhead Door Mount N.C. Magnetic Contact w/ 3 Wires for N.O./N.C. Applications (One Pack)

need a good masonry drill bett

Use with konnected for home assistant. Works great.

Used in conjunction with a 24VAC relay to turn lights on when garage door opens. Works well. I have purchased my third magnetic switch for indicator light on garage doors (3 doors) this 3rd on I used 120vac through switch to 120vac relay with a 0.3 amp draw. Been on for 4 months and still working well.

Worked as described.

worked great.

Perfect. Using for my Insteon home automation....they used to include this exact item in their garage door kits but have since cheaped out. I ordered this to match the one Ive had for several years when I wanted to add HA control to my second door.

This is a great switch. The switch part is both lightweight and extremely tough; the magnet part is easy to mount and also light. The activation distance is around two inches that makes for finding a nice mount point easy. Additionally, the magnet can be reversed on the mount if you need a little more distance for a weird mounting spot. The armored cable protects the signal wires, so if you run over it with the car it will still work. Since it has normally open and normally closed outputs, it will work in any wired alarm application. Really nice device.

Works on my DSC system without any problems.

I used these switches to put indicator lights in the house so I would know if the garage doors are open or closed. I have used a wireless type of system before, but many times got error message. These wired sensors were installed on top of wall above garage door with magnetic on the door. I wired them to a green light for close and red light for open for each door, using the N/C and N/O contact to turn on the correct light. They worked great and now have a wired system to make sure garage doors are closed.

Good