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

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


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WARNING: Cancer and Reproductive Harm –

Product Description

The Seco-Larm Enforcer Track-Mount Overhead Door Magnetic Contact, NO/NC mounts on a sliding track door to monitor and report the door's open/close status. Its adjustable design allows it to be mounted onto door installation with a gap between 2 to 3 inches wide. Doors with larger or smaller gaps require an L mounting bracket, sold separately. Durable construction protects the internal components and provides a long lasting performance.


  • Used for overhead doors in both industrial and residential situations where a wide gap is present
  • Adjustable to fit most door-channel widths between 2 to 3 inch gaps
  • Rugged aluminum housing, 36" (91cm) Wire leads enclosed in armored cable
  • and iridium-plated contacts allow for longer expected product lifespan and reliable performance in most environments
  • IP65 Weatherproof rating
  • Contact Type: SPDT, For open/closed loop circuits
  • Optional L-bracket (SM-8201-LWQ) available for door channels 2-1/2~4" (62x102mm), dimensions: 3"x2"x1-1/4" (76x51x32 mm)

In The Box:

  • 1 x Contact Switch
  • 1 x Magnet with Bracket
  • 1 x Contact Bracket
  • 1 x Manual

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

Tech Specs

  • Part Number: 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