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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.
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
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.
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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