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🔦 SICK WL12G-3B2531 (1041456) – Polarized Retroreflective Photoelectric Sensor with Autocollimation Optics

Built for precision and rugged performance, the SICK WL12G-3B2531 is a compact retroreflective sensor designed for reliable object detection—even of transparent materials. Featuring autocollimation optics, selectable switching modes, and IP69K protection, it’s ideal for packaging, bottling, and high-speed automation environments.

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✅ Key Features & Technical Specifications

• Part Number: 1041456
• Model: WL12G-3B2531
• Series: W12-3
• Sensor Type: Polarized retroreflective photoelectric sensor
• Sensing Range:
  • 0 to 4 m (with PL80A reflector)
  • Autocollimation optics for precise alignment
• Light Source: Visible red LED (640 nm)
• Light Spot Size: Ø25 mm at 1.5 m
• Switching Outputs:
  • PNP or NPN selectable
  • Light ON / Dark ON selectable via control cable
  • Max output current: 100 mA
• Response Time: ≤ 330 µs
• Switching Frequency: Up to 1,500 Hz
• Supply Voltage: 10–30 VDC
• Current Consumption: ≤ 30 mA
• Connection Type: M12, 4-pin male connector
• Adjustment: 11-turn potentiometer
• Housing Material: Die-cast zinc
• Protection Class: IP66 / IP67 / IP69K
• Ambient Light Immunity: Up to 40 kLux
• Operating Temperature: –25°C to +55°C
• Special Features:
  • Polarization filter for transparent object detection
  • Reverse polarity and short-circuit protection
  • Includes BEF-KH-W12 mounting clamps
• MTTF (Safety): 823 years
• Certifications: CE, UL Listed
• Weight: ~120 g
• Lifecycle Status: Active

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🔁 Related Models in the W12-3 Series

Model Code	Part Number	Output Type	Notes
WL12G-3B2532	1041457	PNP only	Fixed light switching mode
WL12G-3B2533	1041458	NPN only	Dark switching only
WL12G-3B2531-EX	1041459	PNP/NPN	Explosion-proof variant
WL12G-3B2531-LED	1041460	PNP/NPN	Enhanced LED diagnostics

All models share the same rugged housing and autocollimation optics, with output and feature variations for flexible integration.

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📦 Why Choose SICK WL12G-3B2531?

• Autocollimation optics for precise detection and easy alignment
• Selectable output logic for versatile control integration
• IP69K-rated housing for washdown and harsh environments
• Reliable detection of transparent and reflective objects
• Fast switching for high-speed automation systems

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