Fotex A3R 4mx Photoelectric Sensor – High-Performance Industrial Mirror Reflex Sensor

In modern industrial automation, precision, reliability, and adaptability are non-negotiable. The Fotex A3R-4mx (manufactured by Fotek) stands out as a premier mirror reflex type photoelectric sensor designed to streamline your automation workflows. Engineered to deliver exceptional accuracy across complex material handling, packaging, and sorting lines, this industrial photo sensor provides an optimal blend of long-range sensing and rugged durability.

Whether you are looking to replace failing legacy equipment or upgrading your production line with premium DIY project components, the Fotex A3R-4mx offers the universal compatibility and steadfast consistency required to minimize downtime and maximize throughput.

Key Features of the Fotex A3R-4mx Photoelectric Sensor

The engineering behind the Fotex A3R 4mx addresses the real-world challenges faced by engineers in industrial environments. Below are the core advantages that make this sensor an industry benchmark:

Exceptional 4-Meter Sensing Range

Unlike standard proximity sensors that operate over mere centimeters, the Fotex A3R 4mx boasts an impressive, reliable sensing distance of up to 4.0 meters. Using a polarized mirror reflex system, it projects a clean infrared LED beam to a retroreflective target. This long-range capability makes it perfect for wide conveyor systems, safety barriers, gate control systems, and automated warehouse management.

Universal Free-Power Voltage System

Wiring components into multi-voltage industrial environments can often lead to inventory confusion. The Fotex A3R 4mx completely eliminates this issue. It supports an extensive operating voltage range of 24–240 VAC (50/60Hz) as well as 12–240 VDC. This flexible “Free Power” architecture ensures that the sensor can be integrated effortlessly into standard AC mains lines or modern low-voltage DC control panels without requiring additional step-down transformers.

Rapid 15ms Response Time

In high-speed production lanes, a fraction of a second can mean the difference between seamless operations and a bottleneck. With a ultra-fast response time of just 15 milliseconds, this sensor guarantees rapid object detection, making it highly effective for piece-counting applications, sorting machinery, and precise positional indexing.

Technical Specifications and Architecture

Built for resilience, the Fotex A3R 4mx features an optimized internal schematic protected by high-grade industrial packaging.

Built-in Multi-Surge Killer Circuit

Industrial machinery often subjects electronic components to severe electrical noise and voltage spikes. To safeguard your system from premature failures, the Fotex A3R 4mx features a built-in multi-surge killer circuit. This specialized internal network absorbs transient voltage anomalies, ensuring the internal components remain completely protected against heavy inductive load spikes across your factory grid.

Robust IP65 Weatherproof Enclosure

The sensor housing is constructed from high-density, impact-resistant intensive ABS material, coupled with a crystal-clear Polycarbonate (PC) optical lens. Rated at an IP65 protection class, the unit is fully sealed against fine airborne dust, particulates, and water splashes. It functions smoothly in harsh thermal ranges from -20°C to +60°C, handling high-humidity warehouse spaces and standard industrial conditions with absolute ease.

Wiring Configuration and Installation

The Fotex A3R-4mx utilizes a convenient 5-core pre-wired 2-meter cable layout, making it exceptionally straightforward to hook up to your PLCs, solid-state timers, or secondary relays.

• Black Wire: Main Power Line Input (24–240 VAC / 12–240 VDC)

• Brown Wire: Relay Common Contact (COM)

• White Wire: Normally Open Contact (NO) – Triggers <Received ON> output status

• Yellow Wire: Normally Closed Contact (NC) – Triggers <Break ON> output status

An integrated 270-degree sensitivity trimmer on the back of the case allows installers to tune the infrared beam sensitivity to match the ambient room illumination (handling up to 10,000 Lux of artificial light and 30,000 Lux of sunlight) and precisely align the sensor with the reflector lens.

Applications of the Fotex A3R 4mx

Thanks to its flexible contact output structure and high contact current rating, this sensor handles a broad variety of industrial and experimental use cases:

• Conveyor Monitoring & Piece Counting: Instantly detects passing containers, packages, or industrial parts on transport belts.

• Automated Gate and Access Control: Operates reliably as an safety obstruction sensor for motorized warehouse doors or automated rolling shutters.

• Industrial IoT and STEM Projects: Frequently utilized as premium DIY project components for building advanced automated pick-and-place robotics and automated sorting benches.

• Packaging Machinery: Synchronizes bottle filling, box sealing, and labeling apparatus by feeding precise position metrics directly back to control units.