Nortek Security Control FM138 Gate Opening Sensor

Product Description

The NORTEK SECURITY CONTROL FM138 is a magnetic gate opening sensor designed to allow hands-free exit from a property without requiring a remote control or keypad interaction. The sensor detects the metal mass of an approaching vehicle in motion and signals the gate opener to activate, providing a seamless exit experience. It features an adjustable sensitivity range to reduce false triggers from passing traffic or nearby metal objects. Intended for residential gate installations, the FM138 is installed by property owners or low-voltage technicians working with Mighty Mule gate opener systems.

The FM138 is suited for single-gate residential applications where automatic exit detection is needed. It works in conjunction with compatible Mighty Mule accessories and is designed for direct burial installation. The package includes 50 feet of direct burial cable, giving installers sufficient run length for most standard driveway setups without needing additional wire. The adjustable sensitivity setting allows the installer to fine-tune detection range based on driveway width and traffic patterns.

Key Features

• Magnetic sensor detects metal mass in motion for reliable vehicle detection
• Adjustable sensitivity range to minimize false activations
• Includes 50 feet of direct burial cable for underground wiring runs
• Works with all Mighty Mule accessories for expanded system integration
• Direct burial rated cable reduces need for conduit in most residential installs

Compatibility

Compatible with FM700 and FM702 gate openers only. Works in conjunction with all Mighty Mule accessories.

Installation Notes

Installation is typically performed by the property owner or a low-voltage technician. Power down the gate opener system before making any wiring connections. The sensor loop and cable should be buried at a depth appropriate for local frost and traffic conditions, following local codes. Do not install in locations where heavy non-vehicular metal objects may cause persistent false triggering.