Photoelectric Retro-Reflective Sensor – WL100-2N4439

The WL100-2N4439 from the W100-2 series is a high-performance photoelectric retro-reflective sensor equipped with a dual-lens system for precise detection at close distances to the reflector. Its ultra-compact design (only 11 mm wide) makes it ideal for space-constrained applications such as packaging lines, automated machinery, and conveyor systems.

It offers a maximum sensing range of 7.2 meters and ensures reliable detection with visible red LED light at 632 nm wavelength. The sensor supports NPN switching output and allows easy selection between light and dark switching modes via a rotary switch.

Designed for durability and ease of integration, it operates at 10–30 V DC, and consumes minimal power, making it a versatile solution for modern automation environments.

Specifications

• Device type: Photoelectric retro-reflective sensor

• Detection method: Dual-lens system, with minimum distance to reflector

• Housing design: Rectangular

• Dimensions (W x H x D): 11 mm x 31 mm x 20 mm

• Sensing range:

  • Max: 0.01 m to 7.2 m

  • Typical: 0.01 m to 5.5 m

• Light source: Visible red LED

• Wavelength: 632 nm

• Light spot size: Ø 280 mm (at 4 m)

• Switching output: NPN

• Switching mode: Light/dark switching

• Switching mode selection: Via rotary switch

• Signal voltage NPN: HIGH ≈ VS / LOW < 1.8 V

• Supply voltage: 10 V DC to 30 V DC

• Ripple: ±10%

• Current consumption: 30 mA

• Mounting: Easy-to-install compact housing

• Protection: Reverse polarity and short-circuit protection (if applicable based on the series)

• Applications: Object detection on conveyors, presence detection in packaging, and more