Authorized Seco-Larm Reseller

Seco-Larm SM-4105-LQ/B 3/4″ Steel-Door Recessed-Mount Magnetic Contact – Brown, 1″ (25mm) Gap, Closed loop, UL Listed, Pack of 10

Seco-LarmSKU: SM-4105-LQ/B

Sale price$39.75
Usually ships within 3-5 business days
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Call Us: 718-435-2800


  • Used for steel framed doors and windows where space is limited or to avoid unsightly installations
  • Strong one-piece construction
  • Switch and magnet have ribs for securing in holes
  • Contact reed switch is SPST, iridium-plated to have a high melting point and Vickers hardness, supporting higher handling power and longer life
  • 1″ (25mm) Gap, with 18″ (46cm) wire leads
  • Lifetime limited warranty
  • Brown case, high-impact ABS plastic
  • Pack of 10



Loop Type N.C.
Operation Gap 1″ (25mm)
Color Brown
Material – Case High-impact ABS plastic
Material – Terminals 18″ (46cm) leads
Contacts Iridium-plated
Contact Rating 1.0A@10VDC (max), 10W (max)
Operating Temperature -68º~158º F (-20º~70º C)
Switch Cycles 50 Million (0.1mA@5VDC)
Switch Dimensions 1-3/16″ x 15/16″ x 3/4″ (30 x 24 x 19 mm)
Magnet Dimensions 1-3/16″ x 15/16″ x 3/4″ (30 x 24 x 19 mm)
Magnet Type Rare-earth Neodymium alloy

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