The IRB-4X2 is a lens-free infrared thru-beam photoeye kit, built for reliable safety detection at garage doors, rolling doors and parking barriers. The lens-free design reduces sensitivity to fog, dust and sunlight.
Model: IRB-4X2
Type: Thru-beam infrared photoeye kit (transmitter + receiver)
Range: up to 35 m
Alignment angle: 24 degrees
Obstruction penetration: up to 70% (fog, steam, spray)
Power supply: 12-24V AC/DC
Output: dry contact
Housing: NEMA 4X, weatherproof
Technology: modulated infrared, electronic sunlight filter, automatic temperature compensation
UL325 compliant: no, not suitable for monitored safety applications
Application: garage doors, rolling doors, parking barriers, door automation
At a garage door, rolling door, or parking barrier, a photoeye is one of the most fundamental safety provisions: without reliable detection of an obstruction in the door path, there's a risk that a closing door could strike a person or vehicle. Many lens-based photoeyes, however, are sensitive to contamination, condensation, or misalignment, leading to faults over time. The IRB-4X2 is built as a simple, reliable, lens-free solution that largely avoids these issues.
Because the IRB-4X2 uses no lenses, the kit is less sensitive to fog, dust, snow, and bright sunlight than many lens-based alternatives. That not only simplifies installation (alignment is less critical), but also reduces the likelihood of faults from contamination of the optical surface, a common cause of failure with traditional photoeyes in dusty or humid environments.
The kit consists of a transmitter and receiver mounted opposite each other, with an operating range up to 35 metres. The receiver offers a wide 24-degree alignment tolerance, making positioning during installation easier compared to narrower-beam alternatives that require more precise alignment.
The use of modulated infrared light, combined with an electronic sunlight filter and automatic temperature compensation, limits the impact of sunlight, rain, fog, and dust on detection. The kit can see through up to 70% obstruction from fog, steam, or spray without causing false detection or failure.
The IRB-4X2 works with virtually any control board that accepts a dry contact input, without needing additional signal amplifiers or relay boxes. That makes the kit broadly deployable across different brands and types of door operators, without compatibility issues.
The IRB-4X2 isn't suitable for applications requiring UL325-compliant, monitored protection. Those kinds of projects call for a monitored photoeye, such as the IRB-MON2. For regular safety, reversing, or opening functions without that specific certification requirement, the IRB-4X2 is a practical, reliable choice.
The IRB-4X2 is widely used at garage doors, rolling doors, parking barriers, and similar door automation, where simple, robust safety detection is needed without the complexity or cost of a monitored system.
Secumatic supplies the IRB-4X2 as part of the complete vehicle detection and safety sensor range, with support on specification and project advice for installers and technical service providers. Get in touch for advice on the right photoeye for your project.
