SICK WL12-3P2451 Photoelectric Sensor – High-Precision Retro-Reflective Detection
The SICK WL12-3P2451 Photoelectric Sensor is an advanced retro-reflective sensor engineered for precise and dependable detection tasks in industrial automation. Featuring focused optics and a visible red LED (640 nm), it identifies small or transparent targets with exceptional accuracy up to 2 meters. The metal housing ensures mechanical robustness, while its IP66, IP67, and IP69K protection ratings make it suitable for use in washdown or outdoor environments. Compact, reliable, and easy to install, this sensor is designed to enhance process consistency and reduce detection errors in fast-paced manufacturing environments.
Built for demanding conditions, the WL12-3P2451 combines polarization filtering with coaxial optical alignment to minimize interference from reflective or shiny surfaces. Its fast 1,500 Hz switching frequency supports use in high-speed packaging lines and conveyor applications, where timing precision is critical. The adjustable sensitivity control allows quick setup for different materials, while complementary PNP outputs make integration flexible for various control systems. Certified to global quality and safety standards, this sensor provides long operational life and consistent performance, ensuring reliable object detection in automation, logistics, and machine control systems.
Why SICK WL12-3P2451?
Because precision matters — the SICK WL12-3P2451 delivers pinpoint detection with its focused optics and rapid 1,500 Hz response. It’s engineered for environments where reliability and speed can’t be compromised, offering industrial-grade durability and smart alignment to ensure every detection counts, even in harsh or reflective conditions.
What problem does it solve?
The WL12-3P2451 eliminates false readings and missed detections caused by glare, vibration, or inconsistent lighting. It brings stability to fast-moving automation lines by ensuring consistent sensing accuracy, allowing manufacturers to avoid production errors, reduce downtime, and maintain quality control in demanding industrial settings.
Key Features & Specifications – SICK WL12-3P2451: 1041448
| Feature | Details | Benefit |
|---|---|---|
| Functional Principle | Photoelectric retro-reflective sensor (autocollimation/coaxial optics) | Reliable detection of small and transparent objects |
| Light Source | Visible red LED, 640 nm | Easy alignment and stable detection performance |
| Sensing Range | 0–1.3 m typical, up to 2 m max | Flexible operation for short to mid-range detection tasks |
| Output Type | PNP, complementary light/dark switching | Simplifies integration into modern control systems |
| Response Time | ≤ 330 µs | High-speed detection suitable for rapid automation |
| Switching Frequency | 1,500 Hz | Ideal for conveyor and packaging line applications |
| Adjustment Type | 5-turn potentiometer | Quick sensitivity setup for various materials and distances |
| Connection | M12 male connector, 4-pin | Easy plug-and-play wiring and maintenance |
| Housing Material | Metal with PMMA front screen | Durable construction for industrial use |
| Protection Class | IP66 / IP67 / IP69K | Resistant to water, dust, and cleaning chemicals |
| Ambient Temperature Range | –40 °C to +60 °C | Reliable performance across extreme environments |
| MTTFD (Service Life) | Approx. 1,388 years | Long operational life ensures reduced maintenance costs |
| Certifications | ECOLAB, cULus, EU, China-RoHS | Meets global safety and quality standards |
| Special Feature | Focused optics with polarization filter | Enhances accuracy on reflective or glossy surfaces |
Download WL12-3P2451 (1041448) Datasheet
Commercial Information – SICK WL12-3P2451: 1041448
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084171345 |
| Weight | 115 g |
| Country of Origin | Hungary |
The Applications of SICK WL12-3P2451
1. Transparent Bottle Detection in High-Speed Filling Lines
In beverage and cosmetic bottling systems, clear PET or glass containers can be difficult to detect using standard sensors. The WL12-3P2451 overcomes this with its focused red LED beam and polarization filter, allowing it to accurately sense transparent objects even under strong lighting. Its fast 1,500 Hz switching rate ensures reliable trigger signals for filling, capping, or labeling stations. The rugged metal housing and high IP ratings make it suitable for washdown areas, minimizing downtime and ensuring consistent performance on continuous production lines.
2. Edge Detection for Metal and Film Processing Equipment
In metal fabrication or film-cutting operations, precise edge recognition is crucial to avoid misalignment or cutting errors. The coaxial optical design of the WL12-3P2451 delivers sharp detection of narrow edges or material seams, even when the surface is reflective. It operates reliably in environments with vibration, dust, or oil mist, maintaining consistent performance. This enables automated systems to achieve cleaner cuts, better alignment, and reduced waste in sheet-based production applications.
3. Part Presence Checking in Automated Assembly
Automated assembly systems often require confirmation that small components—such as clips, seals, or washers—are correctly positioned before proceeding. The WL12-3P2451 provides precise presence verification, detecting even dark or shiny parts with ease. Its complementary PNP outputs make integration simple for PLC control, ensuring accurate pass/fail feedback in milliseconds. The sensor’s high-speed response and robust build reduce the risk of faulty assemblies and improve overall process reliability in automotive and electronic manufacturing.
4. Loop and Web Monitoring in Printing or Packaging Lines
In printing, textile, or packaging machines, accurate web-loop control ensures consistent tension and feed rate. The WL12-3P2451’s focused optics detect small variations in loop position or sheet overlap at high running speeds. Its resistance to dust and humidity helps maintain accuracy in continuous operations. By providing stable feedback to control systems, it prevents web breaks and material waste, ensuring smoother production flow and higher equipment uptime.
Related Products & Accessories – Compatible with SICK WL12-3P2451
| Category | Model Name | Part Number | Benefits / Description |
|---|---|---|---|
| Mounting Bracket | BEF-WN-REFX | 2064574 | Universal steel mounting bracket for reflectors; provides stable positioning and easy adjustment of the WL12-3P2451 sensor in various orientations. |
| Reflector | PL20A | 1012719 | Compact rectangular reflector with screw connection, ideal for use with WL12 series sensors to achieve maximum detection stability up to 2 m. |
| Sensor Cable (M12, 4-pin, Female) | YF2A14-050VB3XLEAX | 2096235 | 5 m PVC sensor/actuator cable with flying leads; supports secure connection in chemically exposed or clean environments. |
| Connector Plug (M12, 4-pin, Male) | STE-1204-G | 6009932 | Straight unshielded M12 plug with screw terminals; provides easy wiring for signal and power connections. |
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