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Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact, NO/NC


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WARNING: Cancer and Reproductive Harm –


Track the Status of Sliding Track Doors

Monitor the status of your track door with the Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact, NO/NC. This magnetic contact switch is specifically designed to monitor and report the Open/Closed status of a track door mounted overhead. Its adjustable design allows it to be mounted overhead on a door with a wide door-channel gap between 2 and 3 inches wide. Doors with larger or smaller gaps require an L mounting bracket, sold separately. The contact can be mounted directly to the door channel while the magnet can be mounted vertically on the door. The Track-Mount Overhead Door Magnetic Contact is ideal for both residential and industrial properties. Its aluminum housing, iridium-plated contacts, and 36-inch armored cable protect it from extreme environments and ensure long-lasting use.

  • Contact sensor for overhead mounted track doors in both industrial and residential installations
  • Fits 3" gap out of the box, can be adjusted to fit 2 to 2.5" door-channel widths
  • Aluminum housing, iridium-plating, and Vickers hardness for higher power handling and longer lifespan
  • 36" (91cm) Wire leads enclosed in armored cable
  • For Open/Closed loop circuits


  • Contact Switch
  • Magnet with Bracket
  • Contact Bracket
  • Manual

NOTE: L-Bracket for door gap channels 2.5 to 4 inches wide sold separately (SM-8201-LWQ).

Building A Secure Future Since 1971

So many places and things to protect; so many ways to protect them; one partner: Seco-Larm. Under the Enforcer trademark, Home Controls offers an impressive line of Seco-Larm security products, ranging from simple switches to some of the most sophisticated alarm devices. Whether it's physical security, CCTV, access control, RF equipment, or vehicle security, Seco-Larm is the premier choice. Seco-Larm gives its customers an extensive range of dependable, cost-effective security products with a full program of service and support.


  • Manufacturer Part #: SM-4201-L3Q
  • Loop Type: Open/Closed Loop
  • Operation Gap: 3" (76mm)
  • Case Material: Aluminum
  • Terminal Material: 36" (91cm) armored leads
  • Contacts: Iridium-plated
  • Contact Rating: 1.0A@10VDC (max), 10W (max)
  • Operating Temperature: -15 to 160°F (-25 to 70°C)
  • Switch Cycles: 50 Million (0.1mA@5VDC)
  • Switch Dimensions: 3-7/64" x 2-19/32" x 1-13/16" (79 x 66 x 46 mm)
  • Magnet Dimensions: 3-7/32" x 3-17/32" x 1-3/4" (82 x 90 x 44 mm)
  • Magnet Type: Ferrite
  • IP Rating: Weatherproof IP65
  • Warranty: Limited Lifetime