Seco-LarmSM-4601-L3Q Industrial Wide-Gap Magnetic Contact Switches, 3” Operation Gap NO/NC

Seco-Larm SM-4601-L3Q Industrial Wide-Gap Magnetic Contact Switches, 3" Operation Gap NO/NC, Open/Closed Loop (3 Wires)

Seco-Larm SM-4201-LQ Track-Mount Overhead Door Magnetic Contact Switch, Rugged Aluminum Housing, 36" Wire Leads, for Closed Loop Circuits, 3" Gap, Weatherproof, Mounting Bracket Included

Seco-Larm SM-226L-3Q Overhead Door Magnetic Contact, 2.75-inch Gap, Open/Closed Loop Circuits (3 Wires), 24" Armored Wire Leads, Weatherproof