This edge will either be hard wired to the control panel or you can opt for a wireless kit. Available here for purchase without an operator, you can add this edge … Written on Mar 16, 2020 . Protect your gate or garage door with the Liftmaster S505AL Resistive Sensing Edge with Aluminum Mounting Channel. https://www.northshorecommercialdoor.com/liftmaster-s50lm.html Includes: wireless edge receiver and transmitter, 2 AA lithium … Compatible with LiftMaster Gate Operators with Monitored Safety Inputs, LMWETXU Transmitter and L50 and S50 Monitored Resistive Edges. Liftmaster S505AL Safety Edge The safety edge is mounted onto the gate and upon contact will send a signal to the gate opener to reverse, stop or open depending on your set up. LiftMaster Small Profile Monitored Resistive Safety Edge Entrapment protection device help prevent damage to the gate structure, and unnecessary injuries. 5 Star(s) Friendly, … This safety device is fast and easy to install both vertically and horizontally. LiftMaster WR6 Wrap Around Monitored resistive Edge; Latest 5 Stars Reviews from. 5 Star(s) knowledgeable Customer service great prices. Gate operators manufactured after the start of … Monitored Wireless Edge … The S505AL is included with all of our Liftmaster slide gate openers to meet the UL 325 safety standards.