• Kit includes transmitter, receiver, protective hoods and sunshield
  • Thru beam configuration
  • UL325-2018 compliant
  • Four (4) monitoring interfaces
  • 115 ft. operating range
  • Easy installation and set-up
  • Compatible with many operators


The IRB-MON is a monitored, weather-proof, thru beam infrared photoeye solution providing entrapment protection for doors, gates and barriers. The IRB-MON Safety Photo Beam is UL325-2018 compliant and housed in a rugged NEMA 4X enclosure suitable for indoor and outdoor use.

This universal UL325 thru beam photoeye can be used with a wide variety of monitored operators. Additionally, the IRB-MON photoeye is compatible with most non-monitored legacy products. Its robust construction minimizes fogging and false triggering to provide easy alignment.

Features of Our IRB-MON Photoeye Products

  • Type B1, non-contact sensor
  • UL325-2018 compliant
  • Lens-less design
  • Simple 2-wire connection
  • Relay contacts available
  • NEMA 4X enclosure
  • Selectable frequency modes
  • Operating Range: up to 115 ft. (35m)
  • Sensitivity adjustment: potentiometer

The IRB-MON universal UL325 thru beam photoeye has 4 monitoring interfaces:

  1. Normally closed
  2. Two-wire pulsed (2 freq)
  3. Two-wire pulsed (3 freq)
  4. 10k resistive termination
Operating range up to 115 ft. (35m)
Sensitivity adjustment potentiometer
Power indicator Green LED
Detect indicator Green LED
Mode selection switch 3 modes, relay output, pulsed (3 frequency), pulsed (2 frequency)
Relay output operation Light on/dark on selection
Relay output Form C contacts (NO, COM, NC)
Resistive termination 10k Ohm across NO contact
Power protection Thermal fuse
Transmitter power cycle >300mS (for use in configuration 0 Monitored)
Power supply 6…35 VDC, 12…24VAC (configuration 0-relay only)
Current (config. 1 and 2) 15mA (12VDC, includes TX and RX wired in parallel)
Current (config. 0) 60mA (relay activated)
Operating temperature -40°F…170°F (-40°C…77°C)
Environmental NEMA 4X
Dimensions (L x W x H) 2.3” (57mm) x 2.6” (65mm) x 3.7” (94mm)
Weight TX – 0.35 lbs (159 g), RX 0.35 lbs (159 g)
Connections TX-2 terminal, RX-5 terminal

Gold anodized aluminum protective hood
set of 2
(choose between gold or gray)

Gray powder coated steel
protective hood
set of 2
(choose between gold or gray)

Receiver sunshield


Black powder coated steel
bollard for photoeye
Learn more

White nylon liquid tight strain relief connector
set of 2

White nylon mounting screws with nuts
set of 2
Steel “L” shaped mounting bracket
3″ x 2″ x 9″
set of 2

Spec Sheet

Blue RX – Manufactured before 6/2020

Red RX – Manufactured after 6/2020

SPANISH – Red RX Manufactured after 6/2020

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