Seco-Larm SM-4201-L3Q TRACK-MOUNT SPDT OVERHEAD MAGNETIC DOOR CONTACT.

• 3″ (76mm) Gap for overhead doors in both industrial and residential situations
• Adjustable for door-channel widths from 2~2-1/2″ (51~64 mm)
• Rugged aluminum housing
• 36″ (91cm) Wire leads enclosed in armored cable
• Contact reed switch is iridium-plated to have a high melting point and Vickers hardness for higher power handling and longer expected life
•  Also available for wide door channel widths of 2-5/8~4″(66~101 mm): SPST closed loop circuit (SM-4201-LWQ)
• Mounting brackets included
• Lifetime limited warranty

Optional Accessory – SM-8201-LWQ

• L-bracket for door channels up to 4″ (102mm)