2Sets Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch for GPS,Alarm or Other Device,DC 5V 12V 24V Light

The SpzcdZa 2Sets Magnetic Reed Switch is a game-changer when it comes to door and window security. These switches are designed to keep your home or office safe and sound, and they do it effortlessly. With a variety of voltage options (5V, 12V, and 24V), these magnetic reed switches are versatile and compatible with various devices, including GPS systems and alarms. What sets them apart is their dual functionality. They can be used as normally open (NO) or normally closed (NC) switches, depending on your needs. Imagine a scenario where you've installed these switches on your doors and windows. They seamlessly detect any unauthorized entry, triggering an alarm or alerting your security system. The peace of mind these switches offer is unparalleled. What's even more impressive is the reliability of the SpzcdZa Magnetic Reed Switch. They are built to last and withstand the test of time, ensuring your security remains top-notch. Plus, they're incredibly easy to install, making it a hassle-free experience. In a world where security is paramount, the SpzcdZa 2Sets Magnetic Reed Switch is a must-have. It's not just a product; it's your guardian, providing security and peace of mind that you can rely on day in and day out. Don't compromise on safety; choose SpzcdZa for a safer tomorrow.

These switches worked for my garage door. I took an old garage door opener, added a Raspberry Pi and these switches and made my garage door wireless to recognize when it’s open or closed.

I have several sets on 50-100' wire lengths back to an MCP23017 I/O expander chip at 3.3V, set to generate an IRQ on edge events. As with most switches, they were quite "bouncy" at first, but a 1uF cap across each (at the controller end) solved that Contact resistance was generally 3-6 ohm, which was fine, but one side of one of the switches (I can't remember if it was NO or NC side) was up over 600-800 ohms at first, varying slightly on every cycle, but never as bad as the one in Nancy's review. However, this "fixed" itself after I accidentally dropped it about 5' on to a concrete floor, and has operated reliably ever since! I used large enough pull-up resistors (22k?) on these sense lines to hopefully tolerate that level of contact resistance if it returns, but after 4 months, it's still under 10 ohms. The double-throw design of reed relays inside these could make intermittent marginal contact more likely. I'd have chosen NC-only (closed when magnet is present) if those were available for the same price. You really don't want to run any significant current or voltage across these. It may work at first, but contacts are unlikely to last very long in this role. Use a FET, etc. if needing to directly switch a load.

I am using these on my snap-on tool box to trigger lights in my hutch and locker when I open them. At first I used this straight to power the lights but when one switch overheated and did not turn off when closed I decided to trigger relays with these instead and they have worked perfectly every time now.

I used these in my RV to have some closet lights I installed come on automatically when any of three doors open. These were really easy to wire although getting the metal place to align was a challenge because it could spin within the channel for the connection, this could be solved by weeding the metal plate or making the molded channels a little closer together. Once I got it all wired up, I had trouble getting them to work properly. I noticed that about half of the sensors were "stuck" and need a decent tap on them to get them to free up. After tapping the sensors, they worked as expected. This was very frustrating to work through though but a tap with the back of a screwdriver is all it took. These have worked flawlessly since install and its a huge upgrade to my RV with something so simple!

Works as discribed i used it to activate a led light when a door is opened into a dark room they are a bit cheesy feeling for the mony and i wouldnt put in serious voltage through them but they work

Used these to turn compartment lights on and off in my bass boat. Have used them for several years with no problems!!!

Worked great