3 Sets NO/NC Black Magnetic Switch Wiring Recessed Door Sensor Hidden Window Contact Reed Switch for Access Control Replace Alarm System

Work great for my modified pantry automatic light switch

Switches work great, like the NO or NC combination, was unsure of what I needed. Adapted to control travel of gate arm actuator.

All 3 failed. 1 failed to work immediately. The second showed 2 volts leaking through in the closed state when connected to a 12v source. The third lasted 2 days until it stopped turning off.Very disappointed, will look elsewhere.

The media could not be loaded. The lights came with everything I needed to mount, route and switch with several options for each. Installation was straight forward and required little more than a dash of common sense to perform. However, anything Beyond a standard install has its challenges.As an example, I did not want to use the provided, physical on/off switch. I preferred a magnetic switch so the unit would come on when I opened the cabinet door. While this was accomplished easy enough, the lights use very, very thin (22 gauge) wire. Splicing, connecting and soldering proved difficult. If you take your time, it's very doable. Just know, it is finicky and there isn't much "wire slack" if you make a mistake. As you see in the video, the lights as well as the secondary purchased magnetic switch works very well.

I didn't notice they are normally closed, just had to change my code to work correctly.

Nice that these magnetic switches can be configured in NO or NC. Screws included for hard mount installation, no sticky pad on backside of them. Little trick with these is to use double sided tape for initial install to align them, when set right then drill for screws. Good replacement for worn out magnetic door switch on my coach.

The media could not be loaded. Almost 40 years old, this stack unit has had this desk door drop-down liquor cabinet with no lighting. Tech catching up with need, I installed this LED light bar (also from Amazon) and triggered with one of these reed switches. Switches only need to interrupt the positive voltage wire and all that is needed is to connect one end to the Common wire and the other to the Normally Open or Closed, depending upon your application. In this case NO (off), so that the light comes on when opening the door. Magnet position is critical both for alignment and distance. Product is great. Specs say it is good for a million cycles, to which I cannot speak in this review and by which time I shall have passed on.

Two of the three switches now are not working. But to late to return. Please advise.