$ 115.92
SICK WTB11-2N1131 photoelectric sensor with background suppression ensures accurate object detection, fast response, and reliable performance in industrial automation.
The SICK WTB11-2N1131 photoelectric sensor with background suppression is a compact industrial sensing solution designed for precise object detection in tight installation spaces. It addresses common detection problems caused by reflective or changing backgrounds by clearly distinguishing target objects within a defined sensing distance. Using visible red LED light and a finely focused light spot, the sensor delivers stable and repeatable switching results. Its robust housing, wide operating temperature range, and fast response make it suitable for continuous operation in demanding automation environments such as conveyors, packaging machines, and assembly systems.
The SICK WTB11-2N1131 improves process reliability by reducing false detections from machine frames, belts, or reflective surfaces behind the target. Background suppression ensures only the intended object is detected, even when object color or surface finish varies. The precise adjustment mechanism allows accurate setup during commissioning, while the fast switching response supports high-speed production lines. With its durable enclosure and resistance to dust, moisture, and washdown conditions, this sensor helps minimize downtime, reduce maintenance effort, and maintain consistent performance across long production cycles.
Why SICK WTB11-2N1131?
The SICK WTB11-2N1131 stands out for its ability to deliver dependable object detection in environments where space is limited and background conditions are unpredictable. Its background suppression technology, fine light spot, and precise adjustment capability allow it to perform consistently across different materials and surface finishes. Combined with a rugged industrial housing and fast response time, it is a smart choice for engineers who need accuracy, stability, and long-term reliability without complex setup or frequent recalibration.
What problem does it solve?
The SICK WTB11-2N1131 solves the common challenge of false or unstable detection caused by reflective backgrounds, shiny machine parts, or varying object colors. Traditional sensors often misread these conditions, leading to downtime or rejected products. By clearly separating the target object from the background, this sensor ensures reliable switching, even on fast-moving lines. The result is smoother operation, fewer errors, and improved process efficiency in real-world industrial automation applications.
| Feature | Details | Benefit |
|---|---|---|
| Sensor Type | Photoelectric proximity sensor | Enables non-contact object detection, reducing mechanical wear |
| Detection Principle | Background suppression | Prevents false detection from reflective or moving backgrounds |
| Sensing Range | 20 mm to 350 mm | Reliable detection across short to mid-range distances |
| Light Source | Visible red LED (640 nm) | Easy alignment and stable detection performance |
| Light Spot Size | Ø 6 mm at 200 mm | Accurate detection of small or closely spaced objects |
| Adjustment Method | 5-turn potentiometer | Fine and precise sensing range setup during commissioning |
| Switching Output | NPN, complementary | Flexible integration with common PLC and control systems |
| Switching Mode | Light / dark switching | Adaptable logic behavior for different applications |
| Response Time | ≤ 2.5 ms | Suitable for fast-moving production and conveyor lines |
| Switching Frequency | Up to 200 Hz | Supports high-speed object detection |
| Supply Voltage | 10 V DC to 30 V DC | Wide voltage range for easy system compatibility |
| Output Current | ≤ 100 mA | Direct connection to control inputs without relays |
| Connection Type | 4-wire cable, 2 m length | Simple installation and reliable signal transmission |
| Housing Material | Plastic (ABS) | Lightweight yet durable for industrial environments |
| Optics Material | PMMA | Stable optical performance with long service life |
| Enclosure Rating | IP66 / IP67 / IP69K | Resistant to dust, water, and high-pressure washdown |
| Operating Temperature | –30 °C to +60 °C | Reliable operation in harsh industrial conditions |
| Service Life (LED) | Approx. 100,000 hours | Low maintenance and long operational lifespan |
| Certifications | CE, UKCA, cULus, EAC, ECOLAB | Approved for global industrial and hygienic applications |
Download SICK WTB11-2N1131 (1041379) Datasheet
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084180361 |
| Weight | 138 g |
| Country of Origin | Hungary |
In automated packaging operations, stable carton detection is essential to prevent sorting errors and line stoppages. This sensor is mounted along conveyor systems to detect cartons with different colors, sizes, and surface finishes as they move at high speed. Its background suppression capability allows it to ignore reflective belts, rollers, and metal frames behind the cartons. The fast response time ensures accurate detection even when products are closely spaced. The compact housing makes installation easy in tight conveyor layouts, improving line reliability, reducing downtime, and ensuring smooth coordination with downstream equipment.
In assembly environments, confirming that components are correctly positioned before the next process step is critical. This sensor is installed near fixtures or workpiece holders to verify part presence before pressing, fastening, or robotic pick-and-place actions. The small, focused light spot allows precise detection of compact parts, while background suppression eliminates false signals from metallic jigs or machine structures. This ensures that machines only operate when the correct component is present, helping to prevent assembly errors, reduce scrap rates, and protect tools from damage.
Packaging and filling machines often present challenging optical conditions due to reflective surfaces, transparent guards, and moving mechanical parts. In these systems, the sensor is used to detect containers, trays, or packages as they pass through filling, sealing, or inspection stages. Background suppression maintains reliable detection regardless of changing packaging materials or surface reflections. The adjustable sensing range supports precise setup, while the robust enclosure withstands regular cleaning. This results in fewer false triggers, consistent production flow, and improved machine uptime.
In intralogistics and material handling systems, accurate position feedback is required to control movement and avoid collisions. This sensor is applied to detect pallets, bins, or carriers approaching stops, transfer points, or accumulation zones. Background suppression ensures stable detection even in steel-rich environments with reflective structures. Its fast switching response supports smooth motion control, while the wide operating temperature range allows reliable use in warehouses and loading areas. This helps maintain efficient material flow, reduces handling errors, and supports uninterrupted operation.
| Category | Model Name | Part Number | Benefits |
|---|---|---|---|
| Mounting Bracket | BEF-WG-W12 | 2013942 | Stainless steel mounting bracket designed for secure and vibration-resistant installation of W11-2 series sensors |
| Clamp Plate System | BEF-KHS-N11N | 2071081 | Universal clamp plate set enabling flexible mounting on machine frames and profiles |
| Connection Cable | STE-1204-G | 6009932 | M12, 4-pin male connector cable ensuring reliable electrical connection and simplified wiring |
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Warranty – 1-year warranty for your peace of mind.
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