SICK WL24-2B230 Photoelectric Sensor

 

 

Product Overview

The SICK WL24-2B230 is a retro-reflective photoelectric sensor used in industrial automation for object detection, position sensing, and conveyor control.

It works by emitting a visible red light beam toward a reflector and detecting the returned signal when an object interrupts or reflects the beam.

Key Specifications

• Brand: SICK
• Model: WL24-2B230 (W24 series)
• Type: Retro-reflective photoelectric sensor
• Detection Range: up to 15 m typical / 22 m max
• Light Source: Visible red LED
• Sensing Principle: Dual-lens retro-reflective design
• Supply Voltage: 10–30 V DC
• Output Type: NPN / PNP selectable
• Switching Mode: Light/Dark switching
• Adjustment: Potentiometer tuning
• Connection: M16 cable gland or wired terminal version
• Housing: Industrial rugged rectangular housing
• Protection Level: Industrial IP rating (commonly IP67 class)

Working Principle

This sensor operates using a reflector-based detection system:

• Sensor emits red LED beam → hits reflector → returns signal
• When an object blocks the beam:
  • Signal strength changes
  • Output switches ON/OFF

This allows:

• Presence detection
• Counting objects on conveyor
• Position and safety detection

Advantages

• Long detection distance (up to 22 m)
• Stable operation in industrial environments
• Easy installation (single sensor + reflector)
• Strong resistance to ambient light interference
• Adjustable sensitivity via potentiometer
• Compatible with both NPN and PNP systems

Applications

• Conveyor systems
• Packaging machines
• Material handling systems
• Warehouse automation
• Bottle and label detection
• Machine safety and positioning

Precautions

• Reflector must be correctly aligned for stable detection
• Dust or dirt on reflector reduces accuracy
• Strong sunlight or reflective surfaces may affect sensing
• Wiring must match NPN/PNP configuration correctly
• Keep correct distance within rated sensing range
• Avoid vibration misalignment in installation