LiftMaster Small Profile Monitored Edge with Aluminum Channel - 4ft

LiftMaster S504AL Small Profile Monitored Safety Edge with Aluminum Channel – 4 Ft

The LiftMaster S504AL Small Profile Monitored Safety Edge is a high-quality monitored entrapment protection device designed for automatic gates, commercial doors, and access control systems. Built for reliability, safety, and UL325 compliance, this 4-foot monitored resistive edge helps protect people, vehicles, and property by detecting obstructions and immediately signaling the gate or door operator to stop and reverse motion.

Featuring a compact small-profile design, the LiftMaster S504AL is ideal for installations where space is limited while still providing dependable obstacle detection for residential, commercial, industrial, and high-traffic gate systems. The included aluminum mounting channel ensures secure installation and long-term durability in indoor and outdoor environments.

This monitored safety edge is commonly used with LiftMaster gate operators and monitored safety systems requiring UL325-compliant entrapment protection. Its weather-resistant construction and dependable sensing technology make it a trusted solution for professional gate installers, facility managers, contractors, and access control specialists.

Key Features

• Genuine LiftMaster monitored safety edge
• Small profile design for low-clearance applications
• 4-foot monitored resistive sensing edge
• Includes durable aluminum mounting channel
• Detects obstructions and triggers gate reversal
• Designed for UL325-compliant safety systems
• Weather-resistant construction for outdoor use
• Ideal for residential and commercial gate operators
• Fast and secure installation
• Compatible with monitored LiftMaster systems

Common Applications

• Automatic sliding gates
• Swing gate operators
• Commercial gate systems
• Industrial access control
• Security barriers
• Warehouse doors
• HOA and apartment gate entrances
• Commercial overhead doors

Compatible With

• LiftMaster monitored gate operators
• LiftMaster UL325 safety systems
• LiftMaster monitored input boards
• LiftMaster wireless edge kits
• Commercial monitored entrapment protection systems

Technical Specifications

• Model: S504AL
• Length: 4 Feet
• Type: Monitored Resistive Safety Edge
• Profile: Small Profile
• Mounting: Aluminum channel included
• Application: Gate operators and commercial door systems
• Installation: Vertical or horizontal mounting
• Compliance: UL325 monitored safety requirements

Important Compatibility Information

The LiftMaster S504AL is designed for monitored safety systems and may require a compatible LiftMaster monitored interface, wireless edge transmitter, or monitored gate operator depending on the installation setup. It is not intended for non-monitored gate operators unless compatible monitoring hardware is used.

Common Search Terms

LiftMaster S504AL, LiftMaster monitored safety edge, LiftMaster 4ft safety edge, LiftMaster small profile edge, monitored gate edge, UL325 safety edge, LiftMaster gate sensor edge, automatic gate safety edge, LiftMaster entrapment protection, LiftMaster aluminum channel edge, commercial gate safety edge, LiftMaster gate operator accessory.

Package Includes

• LiftMaster S504AL monitored safety edge
• Aluminum mounting channel
• Mounting hardware
• Installation instructions

The LiftMaster S504AL Small Profile Monitored Safety Edge is an ideal replacement or upgrade solution for maintaining safe, compliant, and reliable operation of automatic gate and commercial access systems.