The Seco-Larm E-931-S50RRGQ Reflective Photoelectric Beam Sensor is a professional-grade safety device designed for automatic gates, garage doors, and access control systems. This retro-reflective photo eye uses an infrared beam and reflector system to detect obstructions, helping prevent accidents and ensuring compliance with UL325 safety standards.
With a detection range of up to 50 feet, this sensor is ideal for residential and commercial gate systems. Its weatherproof housing protects against outdoor conditions, while the compact design allows for easy mounting and alignment. Unlike dual-beam systems, this unit requires only one sensor and one reflector, simplifying installation and reducing wiring complexity.
Technical Specifications
Model: E-931-S50RRGQ
Type: Reflective Photoelectric Beam Sensor
Detection Range: Up to 50 ft (15m)
Voltage: 12–30V AC/DC
Current Draw: ~100mA
Relay Output: Form C (NO/NC/COM)
Weather Rating: IP55
Reflector Size: ~3.25" diameter
Tamper Switch: Yes
LED Indicator: Yes

Included Components
1 × Photoelectric Sensor Unit
1 × Reflector
Mounting bracket
Mounting hardware
Installation instructions

Installation Overview (PRO-Friendly)
Mount sensor on one side of gate or opening
Mount reflector directly across from sensor
Align beam using LED indicator
Connect power (12–30V AC/DC)
Connect relay output to gate operator safety input
Test obstruction detection
Verify UL325 compliance operation

Applications
Automatic gate systems
Sliding and swing gates
Garage door safety systems
Industrial automation
Perimeter detection systems