LiftMaster Large Profile Monitored Edge with Aluminum Channel - 4ft

LiftMaster L504AL Large Profile Monitored Safety Edge with Aluminum Channel – 4 Ft

The LiftMaster L504AL Large Profile Monitored Safety Edge is a high-performance monitored entrapment protection device designed for automatic gates, commercial doors, and industrial access control systems. Built for safety, durability, and UL325 compliance, this 4-foot monitored resistive edge detects contact with obstacles and immediately signals the gate or door operator to stop and reverse movement, helping protect people, vehicles, and property.

Featuring a large-profile design, the LiftMaster L504AL provides a wider sensing surface for improved obstacle detection and reliable performance in high-traffic residential, commercial, and industrial environments. The included aluminum mounting channel offers secure installation and long-lasting durability for both indoor and outdoor applications.

The LiftMaster L504AL is commonly used on sliding gates, swing gates, barrier arms, commercial overhead doors, warehouse systems, and controlled-access entry points where monitored safety devices are required. Designed for compatibility with LiftMaster monitored gate operators and UL325-compliant safety systems, this monitored edge delivers dependable performance in demanding operating conditions.

Key Features

• Genuine LiftMaster monitored safety edge
• Large profile design for increased contact area
• 4-foot monitored resistive sensing edge
• Includes durable aluminum mounting channel
• Detects obstructions and activates stop/reverse function
• Designed for UL325-compliant monitored systems
• Weather-resistant construction for indoor and outdoor use
• Ideal for commercial and residential gate systems
• Reliable performance in high-cycle applications
• Easy installation and professional-grade durability

Common Applications

• Automatic sliding gates
• Swing gate operators
• Commercial gate systems
• Industrial access control
• Security barrier systems
• Commercial overhead doors
• Warehouse and loading dock systems
• Apartment and HOA gate entrances

Compatible With

• LiftMaster monitored gate operators
• LiftMaster monitored safety systems
• LiftMaster wireless edge kits
• UL325-compliant monitored systems
• Commercial gate and door operators

Technical Specifications

• Model: L504AL
• Length: 4 Feet
• Type: Monitored Resistive Safety Edge
• Profile: Large Profile
• Mounting: Aluminum channel included
• Installation: Vertical or horizontal mounting
• Application: Automatic gates and commercial door systems
• Compliance: UL325 monitored safety requirements

Important Compatibility Information

The LiftMaster L504AL is designed for monitored entrapment protection systems and may require a compatible LiftMaster monitored interface, wireless edge transmitter, or monitored operator input depending on the gate operator being used. It is not intended for non-monitored systems unless compatible monitoring equipment is installed.

Common Search Terms

LiftMaster L504AL, LiftMaster large profile edge, LiftMaster monitored safety edge, LiftMaster gate safety sensor, LiftMaster 4ft monitored edge, UL325 safety edge, LiftMaster gate entrapment protection, automatic gate safety edge, LiftMaster resistive edge, LiftMaster aluminum channel edge, commercial gate safety edge, LiftMaster gate operator accessory.

Package Includes

• LiftMaster L504AL monitored safety edge
• Aluminum mounting channel
• Mounting hardware
• Installation instructions

The LiftMaster L504AL Large 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.