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

Great solution for monitoring garage doors and other roll up doors. I have used these at businesses as well as on moving trucks.

Excellent product.

Installed and works perfectly. Mounting bracket for the magnet leaves lots of options. I moved the magnet on all three and trimmed the bracket on two. East to make work for my doors. I installed them on the top of the door with the contact on the overhead door opening.

Good

This worked great on my new garage door. I use it to indicate if the door is open or closed on my detached garage in the house.

Buy this one instead of the Honeywell Contacts because this one have contacts for both Normally Open (NO) and Normally Closed (NC) circuits so I use one for my alarm and another circuit for indicator for the garage doors are open or closed. There are no label the wires so you need to test it with test meter. Need to connect to a relay if pull more amperage or volts. The distances apart can be up to 2 inches.

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

This was needed to replace a failed magnet switch which Id bought about a month earlier to make an indicator light for my garage door. I wish Id gone this route the first time. This item is very high quality and was easy to install as it is made for this application.

10/10 would bang

It worked except below 0 is a problem. When its cold swing a stronger magnet across it. That wakes it up.