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Installation Instructions
- The door and window magnet should be installed at the closed position of the door/window.
- The magnet part is installed on the movable door and window. The switch part is installed on the fixed door and window frame. The switch part and the magnet part should be aligned as much as possible.
- The door magnet should be away from the strong magnetic field interference source such as a transformer. Otherwise, the working characteristics of the door magnet will be changed and possible wrong actions.
About Normally Closed and Normally Open
N.C. / N.O. Definition
- N.C. means Normally Closed: When the magnet together, the circuit is conductive( light on ); When the magnet separates, the circuit is not conductive ( light off );
- N.O. means Normally Open: When the magnet separates, the circuit is conductive( light on ); When the magnet together, the circuit is not conductive ( light off ).
- Please check the right need carefully before purchasing it!
john S-C
Reviewed in the United Kingdom on March 10, 2024
Did what it said it would do, no problems.
Peter Eason
Reviewed in the United Kingdom on March 25, 2023
Returned, not required
May Lawrence
Reviewed in the United States on February 10, 2023
Maybe Im just not able to figure out what other people can, but I got an envelope with a plastic bag inside. Inside the bag were two magnetic bits, and two bits that do not appear to be magnetic with a couple of wires sticking out. There's no place I can find to connect the wires to the magnetic bits. There's no switches. There's no instructions. I don't know what I am supposed to do with any of it. I tossed it in a junk drawer to be forgotten.
Danny A.
Reviewed in the United States on April 27, 2023
As the title says. It works but it feels incredibly cheap. It feels like it will fall apart while handling it. But so far it is installed in my homes hardwired security system and works when the window is opened or closed.
Milton H.
Reviewed in the United States on July 13, 2022
I have an old Radio Shack (1984) alarm system. It's word 38 year with no real problems since the first month or so from non-magnet sensors. These are perfect replacement for the old magnets and sensors.
Graeme S.
Reviewed in Canada on April 14, 2022
I needed a magnetic switch for a vacuum system. I tried this one and it worked a treat.
Greg Withnail
Reviewed in the United Kingdom on July 1, 2021
It works, which is all you want really.
Benjamin Campfield
Reviewed in the United States on December 4, 2021
First off, it works. I’ve had it installed as part of my front door alarm system for about 6 weeks. It’s doing fine. The quality isn’t fantastic. It’s pretty cheap plastic… and i have no idea of knowing what the internal reed switch is like… but it does work. It is small, which is a benefit. Fingers crossed that it lasts a long time.
Tracey Johnson
Reviewed in the United States on January 18, 2021
Works as described.
robert hess
Reviewed in the United States on July 10, 2020
As described, fast shipment,
Ramz
Reviewed in the United States on June 12, 2020
Replaced a old mechanical switch for a security system on a sliding glass door
Tanveer
Reviewed in Canada on February 14, 2020
Arrived about 2 weeks before the estimated delivery date. Worked well for its purpose. Quality is good and doesn’t feel cheap. Unfortunately I ordered the wrong switch accidentally.
B. Wilson
Reviewed in the United States on April 8, 2019
Easily connected to my GoControl z-wave contact sensor to turn the sensor into a mailbox sensor. You can’t put the sensor in a metal mailbox, so an external reed switch solves this problem! Other benefit is it’s small and obtrusive inside my mailbox.
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