$ 120.52
SICK WTB11-2P1131 photoelectric sensor with background suppression for accurate short-range object detection in compact industrial automation systems.
The SICK WTB11-2P1131 photoelectric sensor with background suppression is a compact industrial sensor engineered for precise object detection in tight installation spaces. It solves common detection issues caused by reflective surfaces or complex backgrounds by distinguishing the target from its surroundings with high accuracy. Operating within a 20 to 350 mm sensing range and using visible red LED light, it delivers stable and repeatable results. Its rugged housing and fast switching behavior make it suitable for demanding automation environments where reliability, accuracy, and space efficiency are critical to maintaining consistent production flow.
The SICK WTB11-2P1131 is designed to maintain detection stability even when object colors, materials, or background distances vary. Background suppression minimizes false triggers, improving process consistency on conveyors, packaging lines, and automated assembly systems. Fine sensitivity adjustment allows precise tuning during setup, reducing commissioning time. With rapid response capability, the sensor supports high-speed operations without signal loss. Its robust construction ensures reliable performance in dusty, humid, or washdown conditions, helping manufacturers reduce unplanned downtime while maintaining dependable long-term operation.
Why SICK WTB11-2P1131?
The SICK WTB11-2P1131 is chosen when detection accuracy must remain stable despite challenging backgrounds, limited space, or varying object surfaces. Its background suppression technology delivers dependable switching without complex setup, while the compact housing fits easily into crowded machine designs. Combined with fast response and industrial-grade durability, it offers a balance of precision, robustness, and long-term reliability that suits modern automated production lines.
What problem does it solve?
The SICK WTB11-2P1131 addresses false detections caused by reflective backgrounds, mixed materials, and inconsistent object colors. Traditional sensors often struggle in these conditions, leading to unstable signals and production errors. By isolating the target from its background, this sensor ensures consistent detection at close ranges, helping manufacturers maintain process accuracy, reduce scrap, and avoid downtime in fast-moving automation environments.
| Feature | Details | Benefit |
|---|---|---|
| Sensor Type | Photoelectric proximity sensor | Reliable non-contact detection for industrial automation |
| Detection Principle | Background suppression | Prevents false switching caused by reflective or distant backgrounds |
| Sensing Range | 20 mm to 350 mm | Ideal for short-range, high-precision object detection |
| 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 precisely positioned objects |
| Switching Output | PNP, complementary | Flexible integration with standard PLC and control systems |
| Switching Mode | Light-on / Dark-on selectable | Adapts easily to different logic and application requirements |
| Response Time | ≤ 2.5 ms | Supports fast-moving production and conveyor systems |
| Switching Frequency | Up to 200 Hz | Reliable detection in high-speed automation processes |
| Adjustment Method | 5-turn potentiometer | Fine, precise tuning for optimal detection accuracy |
| Supply Voltage | 10 V DC to 30 V DC | Compatible with common industrial power supplies |
| Output Current | ≤ 100 mA | Directly drives standard industrial inputs |
| Housing Material | Plastic (ABS), optics PMMA | Lightweight yet durable for long-term use |
| Enclosure Rating | IP66 / IP67 / IP69K | Resistant to dust, water, and high-pressure washdown |
| Operating Temperature | –30 °C to +60 °C | Stable operation in harsh industrial environments |
| Connection Type | 4-wire cable, 2 m | Simple installation without additional connectors |
| Weight | Approx. 200 g | Suitable for compact machines and moving assemblies |
| Certifications | CE, UKCA, UL, EAC, ECOLAB | Approved for global industrial and hygienic applications |
Download SICK WTB11-2P1131 (1041377) Datasheet
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084205941 |
| Weight | 140 g |
| Country of Origin | Hungary |
In automated conveyor systems, accurate detection becomes challenging when background distances or surface colors change frequently. The SICK WTB11-2P1131 performs reliably in these conditions by isolating the product from the surrounding structure. Its background suppression technology ensures only the intended item is detected, not the belt or machine frame behind it. The fast response time supports continuous high-speed movement without missed signals, while the compact housing allows installation close to rollers and guides. This combination helps maintain consistent counting, sorting, and transfer operations even in dense conveyor layouts with varying materials.
Packaging environments often involve shiny films, mixed materials, or reflective machine parts that cause unstable sensor behavior. The WTB11-2P1131 addresses this by maintaining stable detection regardless of packaging surface finish. Its adjustable sensing range allows precise tuning to confirm product presence before sealing, labeling, or filling steps. This reduces false rejects and prevents empty or incomplete packages from moving downstream. By delivering repeatable switching performance at short distances, the sensor improves process reliability and helps packaging lines maintain quality standards while operating at high cycle rates.
Automated assembly processes require dependable confirmation that components are correctly positioned before further operations occur. The SICK WTB11-2P1131 is well suited for detecting parts placed close to fixtures or tooling. Background suppression ensures that only the component is recognized, not nearby metal frames or holders. Its small form factor enables mounting in confined assembly stations, while the quick switching response supports high production volumes. This improves assembly accuracy, reduces rework, and protects downstream equipment from errors caused by missing or misaligned components.
Industrial environments such as food processing or chemical handling expose sensors to moisture, cleaning processes, and temperature variations. The WTB11-2P1131 is designed to operate consistently under these conditions. Its sealed housing protects against water and contaminants, while background suppression prevents unstable switching caused by wet or reflective surfaces. This makes it suitable for monitoring product flow or machine states in areas requiring frequent cleaning. The result is dependable long-term performance, fewer sensor failures, and reduced maintenance effort in demanding production environments.
| Category | Model Name | Part Number | Benefits |
|---|---|---|---|
| Large Stainless Steel Mounting Bracket | BEF-WG-W12 | 2013942 | Provides rigid, vibration-resistant mounting for long-term industrial operation |
| Universal Clamp Plate | BEF-KHS-N11N | 2071081 | Enables flexible positioning and quick sensor alignment or replacement |
| M12 Male Connector, 4-Pin, A-Coded | STE-1204-G | 6009932 | Ensures reliable electrical connection and fast integration with PLC systems |
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