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

So, 5 stars for quality, but yikes, $20 for a magnet sensor, so 4 stars for value. Anyway, I bought a Nexx garage door wifi control which is just a repurposed $5 Sonoff control with a very cheap magnetic sensor for reporting door position, but it also has a fairly good app (so you pay for the app I guess). Read the reviews on the Nexx, a large number talk about it working and then not, becaue the position sensor stops reporting correctly. and thats because It needs an 1/8 gap on a garage door. On my wobbly old door youre never going to get that consistency; so Sentrol to the rescue with their 2 inch gap. This sensor is industrial quality. Buy a LeMotech ABS Plastic Dustproof Waterproof IP55 Junction Box, cut the cord on the cheap magnet, and splice it into the Sentrol inside this box. Two day shipping, problem solved. Oh, and use the black and green wires from the Sentrol for this application.

Used it to replace my ADT floor switch that went out. Was nice having the option to use as NO or NC as I didnt know what my existing switch was. Easy to install and work good. I wasnt going to replace the magnet but this one was a lot nicer so I opted to use it.

Great product and I will definitely buy it again because there is no alternatives.

Very well built. I used this to trigger indicator lights on our driveway gate. Both parts mounted to post and gate with no modifications necessary. The included bracket has plenty of mounting options. I was concerned at first that with the gate being steel if it would affect the magnet, it doesnt. Also, the switch does not have to be mounted as close as possible to the magnet, it will work when the components are about 2 inches apart. Had to mount them farther apart than expected and it still worked fine. The only recommendation I would make to the manufacturer is that the recessed areas to mount the switch be enlarged slightly. The recess is too small to get a socket on a hex head screw making it necessary to use Phillips screws.

just didnt work for me... to bulky and couldnt find a way to mount it for what I was trying to do. Quality seems good, although id like them to discuss the quality of the switch since that part is hidden.

recieved as expected based on description. OEM would have been a better choice.

Just what I needed for my barn roll-up door. Well pleased with all phases of my purchase.

Todo bien

Excellent product. Far better than the run of the mill magnetic switches I first tried. These are very rugged and well made. I highly recommend them.

I bought this to drive a garage door open warning light in my residence. The sensor is designed to be installed on a garage floor, but I chose to install above my rolling door. This meant that the supplied magnet bracket didnt fit, so I built a custom bracket out of sheet metal. Combined with a power supply and blinking LED, I got just what I wanted for less than $30. There are lots of mechanical reed switches available for far less, but I wanted something more robust so Im not replacing it in a year. Im completely satisfied.