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Sensor Type
Contact Closure
Garage Door
Contact Closure / Relay
Ease of Installation
Intermediate (Installs < 60 minutes)
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Protect Your Largest Doors and Gates
SECO-LARM SM-226L-3 Magnetic Garage Door Contact Switch
SECO-LARM Enforcer SM-226L-3 Magnetic Garage Door Contact Switch
SECO-LARM Enforcer SM-226L-3 Magnetic Garage Door Contact Switch
Item# 7455B
Price: Normally $21.99 
Hot Deal $16.34
Free shipping on orders over $175 - See Details


  • Use on large, loose-fitting doors and gates
  • For Closed or Open Circuits
  • Weatherproof die-cast aluminum
  • UL listed for security systems

Essential Info

Use this heavy-duty Magnetic Garage Door Contact Switch on garage doors, roll-up doors and other larger doors or gates where it may be difficult to mount regular magnetic contacts. It can be used with Normally Open (N/O) or Normally Closed (N/C) circuits. These contacts are ideal for larger doors because they can be as far as 2-3/4 inches apart from one-another and still operate while smaller magnetic switches must be within 1/2 inch for reliable operation. Smaller magnetic contacts will be more ideally used on standard doors, windows, and cabinets.


What's Included

  • 1x - Garage Door Contacts for Open or Closed Circuits
  • More Info

    The sensor mounts to the floor and is made of a heavy-duty polished aluminum die-cast housing. The contact switch is completely sealed in this housing. On your door or gate, mount the magnet to complete the system. It is mounted on an adjustable L-bracket and is easily adjustable horizontally and vertically.

    A flexible 24 inch stainless armored cable protects the wires as they run along the ground or up the wall.

    Trigger Lights or Appliances When Your Garage Door is Opened
    Connect the wires from this magnetic contact to an EZIO 2 Input/4 Output Relay Controller and you can trigger INSTEON-enabled devices anywhere in the home.



    Manufacturer Product No.:SM-226L-3
    Compatibility:Use with Closed or Open Circuits
    Housing:Aluminum die-cast
    Cable Length:24 inches
    Rating:0.02Amp./100VDC (max.)
    0.2Amp./10VDC (max.)
    3W (max.)
    Rating:-15 deg. F to 160 deg. F (-15 deg. C to 70 deg. C)

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: SECO-LARM USA Inc, Tel: (949) 261-2999


    59 Ratings
    5 star: 81%  (48)
    4 star: 14%  (8)
    3 star: 3%  (2)
    2 star: 0%  (0)
    1 star: 2%  (1)
    Average Customer Rating
    (59 customer ratings)
    Share your thoughts with other customers
    LAYNE -- bentonville, AR   2/22/2014
    Perfect for triggering the lock on my cat door when the garage goes up.
    LOUIS -- baton rouge, LA   8/31/2013
    excellent service
    J&L -- willington, CT   10/6/2012
    Item arrived as advertised, with speedy delivery and, best of all, works great!!
    JON L. -- wayne, NJ   10/4/2012
    Item was shipped as described, cames with simple instructions, installed easily.
    JAROSLAW -- east hampton, CT   4/9/2012
    quality piece, NO NC is great
    JOSEPH -- goshen, NY   11/7/2011
    Product far exceeding my expectation. I would recommend this product to anyone. Rugged, well design, features, mounting, ease, was excellent..
    JoeC -- New York   10/14/2011
    Excellent....Design & switch packaging excellent-rugged. The gap is over 2.5 inches..That is helpful on aging/twisting doors. The bracket on magnet is great and can be adjusted..The engineering behind the product is well worth the price!! Also the flexibility of N/O vs. NC is excellent.
    DAVID -- tijeras, NM   6/25/2011
    Great for garage door contacts for security systems.
    STEVE -- tempe, AZ   4/18/2011
    Would have bought the normal combo package but I wanted extra I/O Lincs, installed in the normal way as garage door monitor and works great. This is a quality switch I expect will last forever.
    ROBERT -- issaquah, WA   3/21/2011
    Great sensor; works like a charm with the I/O Linc.
    MATTHEW -- la jolla, CA   2/12/2011
    Works fine, easy install, good range of magnet position on door-mounted part.
    TYLER -- rochester, NY   12/17/2010
    Great high quality rugged design, works perfectly!
    MICHAEL -- mcdonald, PA   8/16/2010
    Switch worked great. In conjunction with the X10 Univeral module (2010) was able to quickly setup an x10 module to close the garage door if open.
    Dave -- pittsburgh, PA   7/15/2010
    I am pleased with the build quality of this contact sensor. This sensor and the N/C-only version #7455 is designed to mount to your garage floor on either side of the door, with the magnet attached to the door itself. If you are not intending to mount it on the floor, save some $$ and buy a regular magnetic contact switch instead i.e. #7133, 77415, which can easily be attached to the top edge of most garage doors.
    KEVIN -- niceville, FL   3/29/2010
    Works great... and the adjustable bracket allows for quite a few mounting options. Recommended.
    PAUL -- highland heights, KY   12/16/2009
    With the PowerFlash and a magnetic contact my 'garage door open alert' is working again-- and no batteries required!
    DANIEL -- crown point, IN   10/25/2009
    Excellent product. Will be ordering more of these this month. I used same in my old house ( 8 yrs no failures ) thats why I cam back.
    Frank -- newport beach, CA   9/24/2009
    Easy to install, and with an I/OLInc and Houselinc's new email alerts I get an email notice when our garage door is open - very nice
    MICHAEL -- manorville, NY   9/21/2009
    solid, well made, easy to adapt,wires in bx , accepts wide gap, not succeptable to swingers
    WILLIAM -- pensacola, FL   5/7/2009
    Product was just what I needed, it was simple to install and price was good.


    Ezio 2 Input/4 Output Relay Controller  Garage Door Contacts  Long Round Magnetic Contacts   
    Ezio 2 Input/4 Output Relay Controller  Garage Door Contacts  Long Round Magnetic Contacts   

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