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Sensor
Product name: Surface-mounted Magnetic Door Switch, Type: MC-31, Color: White, Material: Plastic.
NC Type
NC means normally closed. If the magnet is closed to this switch, the signal is conductive, otherwise, if the magnet is far away from this switch, the signal is disconnected.
Sizes
64*12.*12mm and 64*20*12mm（L * W * H ), suitable for magnetic windows, doors, cabinets etc. Ideal for door, window security.
Package Content
Includes 5 Pcs Magnetic Door Switch with 20 Screws.
Darlene
Reviewed in Canada on February 24, 2025
Works great easy to set up l, no sticker have to screw in.
Philip Carlson
Reviewed in the United States on January 7, 2025
These are certainly cheap enough. However, only four out of the five had ON resistance in the single digit ohms. One was very intermittent with ON resistance sometimes over 100 ohms. I only need three, so four out of five will work for me. I would not buy again. It's worth spending a little more for switches that can be depended upon.
Richard Krimm Jr.
Reviewed in the United States on January 24, 2025
Cheaply made. Had them come apart while installing. Product does work well.
Nutoshia Winship
Reviewed in Canada on April 11, 2025
These switches are NO. Meaning without the magnet near the switch, the path is OPEN. When you introduce the magnet near the switch, the path is closed.The title needs to be edited to show NO switches.
Facilities Lead Tech
Reviewed in the United States on June 18, 2024
Product arrived on time and in good order. Easy to install and is working well so far.
kit serrano
Reviewed in Canada on May 20, 2024
I bought it to replace my window contacts for my alarm system. Unfortunately, I had to return the item. The contact overlaps when it is close. I couldn't use it for my application.
Dwight
Reviewed in Canada on February 6, 2024
Contacts worked ok. However one of them in the bag was faulty. It’s ok I only needed one to work.
Gizmo
Reviewed in Canada on February 23, 2024
Fast shipping, and switches installed easily and work great!
Mario
Reviewed in Canada on February 15, 2024
Super product
Customer
Reviewed in Canada on November 17, 2024
The media could not be loaded.
Ricardo
Reviewed in Canada on November 11, 2024
Good
Stan
Reviewed in the United States on August 10, 2023
Ok. Let’s face it that I know nothing about an alarm system. I have an ADT system and a construction worker accidentally broke this small sensor at my basement door. Well after 2 hours of waiting, 4 transfers, and horribly exasperating experience with ADT and so solution. I simply looked on the Amazon for something that looked similar to me and I found this part. The order arrived quickly, it was simple to attach, and it works perfectly. I’m still planning to change from ADT because it’s just terrible.
P. Larsen
Reviewed in the United States on August 16, 2022
These units are simple components with a single electric reed switch and two connectors. The plastic containers have no markings, the the hardware used to attach wires is low quality - out of my 5 I had one or two where the screw wouldn't tighten or loosen.Also there's no data-sheet (model name) for the used reed switch. It not known what voltage/current is acceptable but it's common that these units can take 1A or more. I had one take 200mA/9V and I think it blew - it's constantly conducting regardless of magnet. It would be good to know these data to implement using the proper resistors.The mount/case is actually well designed. There's a protective shield that once you mount the active component, there's no easy access to the wires. The magnet has a N/S which again is not marked. You can feel if you're pushing the wrong pole; I recommend making a small mark so when you mount the unit you know the right direction.If you mount a single wire, you can easily get the electronic component exposed by gently yanking on it. This will allow you to change the reed switch if need be, or make other replacements as needed.
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