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

Todo bien

Good experience. No problems.

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.

This is exactly what I needed for my garage door sensor. I had tried a simple reed switch, like one would use on a window, but it just wasnt up to the task. This item is much hardier, and the results are more predictable - meaning no more false readings. I mounted the switch at the top of my overhead door. Because of limited mounting surface on the wall and clearance requirements on the door, I was not able to line up the magnet with the switch. But even with at 50% overlap, it reads correctly. If you are setting up a door sensor that you want to work well for a long time, this is the switch you need.

I installed two of them on my garage doors in series with my thermostat to turn off the garage heater when the doors are opened. The install was a breeze (used the black and green for n.c.) and they work flawlessly. The pieces seem to be of pretty good quality, and I assume theyll last for years. These are cheaper elsewhere, but without prime shipping.

I purchased this to replace a cheap unit on a NexxGarage controller. The magnetic range and quality of this unit is great. It can be configured as NO or NC.

I have not installed this yet but I have tested it. It appears well made and functions as I expected it to. This switch has the ability to control two functions with NO and NC positions. I plan to use this for my garage door to tell if it open or closed (we have been known to leave the door open all night). The two contacts will let me have a red light if the door is open and a green light if it is closed without using a relay in my DIY indicator panel. This also lets me know of any faults because one light will always be on. That makes for the minimum of circuitry in the panel. I also found a magnetic switch with the same function for the man door.

I have 2 of these installed on garage doors, unheated space for many years and they have never failed in harsh MN weather, that is why I purchased 2 more for barn doors on a new building.

Great purchase.

Use with konnected for home assistant. Works great.