Pepperl+Fuchs RLK28-5531116 | 17m Retroreflective Sensor 12-240V AC/DC Relay

Pepperl+Fuchs RLK28-5531116 retroreflective photoelectric sensor. 17m range, polarized red light, 12-240V AC/DC supply, relay output, IP67, -40 to 60°C.

Product Overview

The Pepperl+Fuchs RLK28-5531116​ (also listed as RLK28-55/31/116) is a long-range retroreflective photoelectric sensor​ from the RLK28 universal series. It features a built-in relay output​ and operates on a wide 12 to 240V AC/DC supply. Key attributes include a 17 m detection range, polarized red light​ for reliable object detection (including shiny surfaces), and an IP67-rated​ housing for harsh industrial environments. It is commonly used in material handling, packaging, and outdoor applications.

Technical Specifications (Optical & Electrical)

Technical Specifications (Mechanical & Environmental)

Key Features

• Universal Voltage Supply:​ Operates on 12-240V AC/DC, eliminating the need for specific power supplies and simplifying spare parts inventory.

• Polarized Light Operation:​ Equipped with a polarization filter to prevent false triggers from reflective objects like metal or glass.

• High Immunity:​ Excellent resistance to ambient light (up to 80,000 Lux) and electrical noise, ensuring stable performance in demanding conditions.

• Integrated Relay:​ The built-in relay contact (2A) allows direct control of loads such as contactors, solenoid valves, or small motors without an intermediate relay.

Applications

• Material Handling:​ Detection of pallets, boxes, or containers on conveyors over long distances.

• Gate & Door Monitoring:​ Presence detection for automated gates, garage doors, and access control systems.

• Outdoor & Harsh Environments:​ Suitable for agricultural machinery, recycling plants, and construction equipment due to its wide temperature range and IP67 rating.