The EMX IRB-MON2 is a universal UL325-compliant monitored thru-beam photoeye sensor designed for automatic gate and door systems requiring robust entrapment protection. Functioning as a Type B1 non-contact sensing device, the IRB-MON2 ensures maximum safety by alerting your operator to the presence or absence of obstructions across a long 115-foot range.
Engineered for versatile compatibility, this sensor supports all three UL325 monitoring protocols: 10K resistive, 2-wire pulse (2 and 3 frequency), and Normally Closed (NC). Its removable terminal blocks, LED alignment indicator, and sensitivity potentiometer allow for a fast, intuitive setup—even in tough environments.
Features:
🔒 Compliant with UL325 Safety Standards – Type B1 entrapment protection sensor for automatic gates/doors.
🌐 Universal Monitoring Support – Compatible with NC, 10K resistive, 2-wire 2-frequency, and 3-frequency pulse.
💡 LED Alignment Indicator – Green LED helps with visual alignment and status monitoring during setup.
📡 Extended Operating Range – Effective up to 115 ft (35 m), suitable for large commercial installations.
🔧 Removable Terminal Block – Simplifies wiring, maintenance, and replacement.
🔄 Fast Response Time – Less than 300 milliseconds for safety-critical applications.
🧭 Sensitivity Control – Built-in potentiometer allows fine-tuning of detection threshold.
❄️ Weatherproof and Durable – Operates in temperatures from -40°F to 170°F with optional metal hoods.

Technical Specifications:
Operating Range: 5 to 115 ft (35 m)
Power Supply: 6–35 VDC or 12–24 VAC
Current Draw (NC/10K): 35 mA DC (aligned & relay active)
Current Draw (Pulse): 15 mA
Relay Output Configuration: Form C: NO, COM, NC
Monitoring Methods: NC, 10K resistive, 2-wire 2 & 3 frequency
Response Time:
Temperature Range: -40°F to 170°F (-40°C to 77°C)
Housing Dimensions: 3.6” × 2.9” × 2.9” (91 mm × 74 mm × 74 mm)
Conduit Hole Size: ½” NPT (21.3 mm)

What's Included:
1x EMX IRB-MON2 Transmitter
1x EMX IRB-MON2 Receiver
Mounting Brackets & Screws
Optional Hood (IRB-MON2-HD available separately)
Installation Instructions