SICK WL8-P1131 Photoelectric Sensor – Compact Precision for High-Speed Object Detection
The SICK WL8-P1131 Photoelectric Sensor is a compact retro-reflective sensor engineered for accurate object detection in fast-paced industrial environments. Using visible red light with a maximum sensing range of 4 meters, it ensures consistent performance on reflective, transparent, or moving targets. Its durable IP67-rated housing and small 11 × 31 × 20 mm footprint make it ideal for installations where space is limited. Built for demanding factory automation, it provides stable operation and quick response, enabling precise detection and reliable control across packaging, assembly, and material-handling systems.
The WL8-P1131 delivers outstanding performance through SICK’s precise optical alignment and autocollimation technology, ensuring accuracy even at high speeds. With a rapid 0.25 ms response time and selectable light/dark switching, it adapts easily to different operational conditions. The built-in potentiometer allows quick sensitivity adjustment, while indicator LEDs provide clear status feedback for maintenance efficiency. Its robust design, low power consumption, and long LED lifetime reduce maintenance costs and extend service life. Ideal for conveyor monitoring, robotic pick-and-place, and parts counting applications, it enhances overall productivity and operational stability.
Why SICK WL8-P1131?
The SICK WL8-P1131 stands out for its lightning-fast detection, compact housing, and superior optical precision. Built to perform flawlessly in tight spaces and high-speed environments, it delivers dependable sensing even on shiny, transparent, or irregular objects. Its intelligent design ensures reliable performance with minimal setup—making it the go-to sensor for modern automation.
What Problem Does It Solve?
The WL8-P1131 eliminates false detections and downtime in rapid production lines caused by vibration, glare, or varying light conditions. It ensures consistent and accurate object detection, even when products move quickly or reflect light unevenly—helping factories achieve smoother workflows, reduced waste, and higher operational efficiency across diverse automation systems.
Key Features & Specifications – SICK WL8-P1131: 6033177
| Feature | Details | Benefit |
|---|---|---|
| Sensor Type | Photoelectric Retro-Reflective Sensor | Detects objects efficiently using reflected light, ideal for fast automation systems. |
| Light Source | Visible Red LED (650 nm) | Provides accurate alignment and stable detection even for reflective or transparent materials. |
| Sensing Range | 0 m … 4 m (typical 3 m with reflector PL80A) | Offers flexibility for various distances, enhancing setup versatility. |
| Response Time | ≤ 0.25 ms | Enables high-speed detection for fast-moving targets. |
| Switching Frequency | 2,000 Hz | Perfect for conveyor, counting, or robotic applications requiring rapid response. |
| Output Type | PNP, Light/Dark Switching | Easily adaptable to different control logic or automation systems. |
| Adjustment Method | 270° Potentiometer | Simplifies fine-tuning of sensitivity to match specific environmental conditions. |
| Indicators | Green (stability) and Orange (output active) LEDs | Provides instant visual feedback for quick setup and troubleshooting. |
| Housing Material | ABS Plastic | Lightweight yet durable for long-term industrial use. |
| Optics Material | PMMA Plastic | Ensures high optical clarity and scratch resistance. |
| Protection Class | IP67 | Dust-tight and waterproof for harsh industrial environments. |
| Operating Voltage | 10 … 30 V DC | Compatible with common industrial power supplies. |
| Current Consumption | 30 mA (typical) | Energy-efficient design for cost-effective operation. |
| Output Current | ≤ 100 mA | Suitable for standard PLC inputs and automation systems. |
| Operating Temperature | –25 °C … +55 °C | Reliable performance across diverse environmental conditions. |
| Dimensions (W × H × D) | 11 × 31 × 20 mm | Compact design fits easily into tight installations. |
| Special Feature | Polarization Filter | Ensures reliable detection even on reflective backgrounds. |
| Certification | CE, UKCA, China-RoHS, Photobiological Safety (DIN EN 62471) | Meets international safety and quality standards. |
| Accessories Included | Reflector P250, Mounting Bracket BEF-W100-A | Complete setup solution for quick installation. |
Download SICK WL8-P1131 6033177 Datasheet
Commercial Information – SICK WL8-P1131: 6033177
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084163364 |
| Weight | 101 g |
| Country of Origin | China |
The Applications of SICK WL8-P1131 Photoelectric Sensor
1. High-Speed Bottle Counting in Beverage Lines
In beverage production, bottles often travel at extreme speeds, making accurate detection vital for labeling and filling control. The SICK WL8-P1131 ensures precise counting with its rapid 0.25 ms response time and strong optical stability. The built-in polarization filter helps maintain accuracy even when glass or PET bottles cause glare. Its small, lightweight body fits easily along conveyors, allowing seamless integration. By ensuring every bottle is detected, it reduces miscounts, prevents labeling errors, and maintains continuous line efficiency without costly stoppages.
2. Part Detection in Automated Sorting Systems
Automated sorting equipment relies on sensors that can detect small, fast-moving objects accurately. The WL8-P1131 is ideal for detecting parts like screws, coins, or components due to its fine light spot and reliable red LED source. Its IP67 protection resists dust and vibration, ensuring stable operation in enclosed sorting tracks. The selectable light/dark switching provides flexibility for different materials and backgrounds. This results in more precise sorting, better throughput, and minimized downtime in automated assembly or packaging environments.
3. Label Presence Verification on Packaging Lines
Accurate label placement is essential in automated packaging. The WL8-P1131 helps verify the presence of labels on cartons or bottles by detecting subtle reflectivity differences between surfaces. The sensor’s sensitivity can be easily tuned via its potentiometer to accommodate different materials and printing finishes. Its LED indicators give immediate feedback, simplifying setup and maintenance. This prevents mislabeled products from continuing down the line, improving quality assurance and reducing material waste during continuous production.
4. Safety Detection in Automatic Doors and Gates
In facilities with automated doors or access gates, the WL8-P1131 functions as a reliable obstruction sensor. When an object or person interrupts the beam, the sensor triggers an immediate stop or reverse motion. The integrated emitter-receiver design simplifies installation and alignment. Its fast response time ensures safety without slowing door movement, while the polarization filter avoids false signals from nearby reflective surfaces. Commonly used in warehouses, loading bays, and production areas, it enhances operational safety and prevents equipment damage.
Related Products & Accessories – SICK WL8-P1131: 6033177
| Category | Product Name / Type | Part Number | Description | Compatibility / Benefit |
|---|---|---|---|---|
| Mounting System | BEF-WN-REFX | 2064574 | Universal mounting bracket for reflectors, made of zinc-coated steel, dimensions 85 × 90 × 35 mm. | Ensures stable installation and accurate sensor alignment for WL8 series sensors. |
| Reflector (Included) | P250 | 5304812 | Standard reflector included with WL8-P1131 sensor. | Enables reliable retro-reflective sensing up to 4 m range. |
| Reflector (Optional) | P250F | 5308843 | Fine triple reflector with screw connection, suitable for laser and optical sensors. | Provides higher precision and stronger light return for challenging detection tasks. |
| Alternative Reflector | PL80A | 5311520 | Large-surface reflector optimized for longer sensing distances. | Extends detection range up to 4 m and enhances stability under low light. |
| Connector Cable | STE-0803-G | 6037322 | Unshielded M8 male connector, 3-pin, straight, A-coded, for 0.14–0.5 mm² cross-section. | Provides reliable connection between WL8-P1131 sensor and control systems. |
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