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Small rectangular plastic sensor with red lens and cable

Sick

Sick WLG4-3E1332 Miniature Photoelectric Sensor NPN

SKU CH-MGKP-308R4

Miniature photoelectric retro-reflective sensor with NPN dark-switching output, 2 m cable and IP67/IP66 rating for detecting transparent objects

  • Compact 16 mm x 39.5 mm x 12 mm housing fits tight spaces
  • Detects transparent objects with retro-reflective photoelectric principle
  • NPN dark-switching output switches in 0.5 ms at 1,000 Hz
  • IP67 and IP66 enclosure rating withstands harsh environments
  • 2 m PVC cable with 3-wire connection simplifies installation

Miniature Photoelectric Sensor for Transparent

The Sick WLG4-3E1332 is a compact retro-reflective photoelectric sensor designed to detect transparent objects in industrial automation. Its 16 mm by 39.5 mm by 12 mm ABS housing fits tight machine spaces. The sensor operates on 10 V DC to 30 V DC supply voltage and provides an NPN dark-switching output with a 100 mA maximum load. It targets engineers who need reliable presence detection for clear materials such as glass or film.

Sensing Range and Visible Red PinPoint LED Limits

The visible red PinPoint LED at 650 nm wavelength produces a 75 mm light spot at 1.5 m distance. Maximum sensing range reaches 4.5 m while the specified operating range covers 0.02 m to 3.5 m with a reflector. Attenuation along the beam exceeds 8 percent and the reception angle is approximately 30 degrees. These optical characteristics define the practical detection zone for transparent targets in contaminated environments.

Cable Connection and Environmental Headroom

A 2 m PVC cable with three 0.14 mm² conductors and 3.4 mm outer diameter provides fixed wiring without a separate connector. The IP67 and IP66 enclosure ratings protect against dust and powerful water jets. Operating temperature spans –40 °C to +60 °C while storage extends to +75 °C. The 0.5 ms response time and 1,000 Hz switching frequency support high-speed counting tasks. Builders needing connectorised variants or longer cable runs must source alternative models.

Highlights

  • Compact 16 mm x 39.5 mm x 12 mm housing fits tight spaces
  • Detects transparent objects with retro-reflective photoelectric principle
  • NPN dark-switching output switches in 0.5 ms at 1,000 Hz
  • IP67 and IP66 enclosure rating withstands harsh environments
  • 2 m PVC cable with 3-wire connection simplifies installation

Specifications

BrandSICK
ModelSICK WFS3-40P415

Questions about this item

What sensing-range versions are listed for this sensor?

The maximum sensing range is 0.01 m to 4.5 m and the typical sensing range is 0.02 m to 3.5 m.

What does the 1,000 Hz switching frequency mean in practice?

The sensor can complete up to 1,000 switching cycles per second with a response time of 0.5 ms.

What cable interface does the WLG4-3E1332 use and what voltage does it support?

It uses a 3-wire PVC cable, 2 m long, and operates on a 10 V DC to 30 V DC supply.

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