$ 120.52
Compact SICK WTB8-N2131 sensor delivers fast, stable object detection with background suppression for high-speed automation and reliable industrial performance.
The SICK WTB8-N2131 photoelectric sensor with background suppression is designed to deliver dependable detection performance in compact automation setups. Its visible red LED, adjustable sensing range from short to mid-distance, and stable optical design help overcome challenges posed by varying surface finishes or colors. Built in a slim rectangular housing, it fits easily into tight machine layouts while maintaining consistent operation in demanding industrial settings. With quick response behavior and durable construction, the WTB8-N2131 provides a reliable solution for applications that demand precision, speed, and long-term stability.
The WTB8-N2131 offers strong detection reliability, even when dealing with dark or low-reflective materials, thanks to its controlled background suppression and adjustable sensing range. Operators can fine-tune the sensor using a multi-turn potentiometer, ensuring stable performance without interference from nearby surfaces. A green stability indicator simplifies alignment and reduces commissioning time, while its fast switching capability supports high-speed production tasks. Compact dimensions and a rugged housing make it suitable for machinery with limited installation room, helping maintain consistent output quality across packaging, assembly, and material-handling applications.
The SICK WTB8-N2131 is built for situations where compact size meets high precision. It delivers stable object detection even when surfaces vary in color, texture, or reflectivity. With fast response, intuitive adjustments, and industrial-grade durability, it becomes a “set-and-forget” sensor that keeps production lines running smoothly with fewer errors and less manual intervention.
The WTB8-N2131 eliminates the common frustrations of unreliable sensing — false triggers, missed detections, and background interference. It ensures consistent detection even in visually challenging environments, helping machines react accurately at high speeds. This solves downtime issues, reduces product handling mistakes, and supports automation systems that rely on dependable, repeatable sensor performance.
| Feature | Details | Benefit |
|---|---|---|
| Functional Principle | Photoelectric proximity sensor with background suppression | Reliable detection even with changing object colors or reflectivity |
| Sensing Range | 40–300 mm adjustable | Flexible distance tuning for various automation setups |
| Maximum Sensing Capability | Up to 300 mm (on 90% remission target) | Stable long-range detection with minimal false signals |
| Light Type | Visible red LED, 650 nm | Easy alignment and fast visual setup |
| Light Spot Size | Approx. 20 mm at 300 mm | Consistent detection even on irregular surfaces |
| Adjustment Method | 4-turn potentiometer | Fine-tuned accuracy for demanding environments |
| Switching Output | NPN, light/dark switching selectable | Works in diverse control system configurations |
| Response Time | ≤ 0.5 ms | Ideal for high-speed production lines |
| Switching Frequency | Up to 1,000 Hz | Supports rapid object detection without lag |
| Connection | M8, 3-pin connector | Quick installation and secure electrical connection |
| Housing Material | ABS plastic with PMMA optics | Lightweight yet durable design for industrial use |
| Operating Temperature | –25 °C to +55 °C | Reliable performance across tough production climates |
| Protection Class | IP67 | Resistant to dust and water exposure |
| Circuit Protection | Reverse-polarity and short-circuit protected | Prevents damage and increases service life |
| Included Mounting Hardware | BEF-W100-A stainless-steel bracket | Immediate installation without extra purchases |
| Stability Indicator | Green LED confirms reliable detection | Reduces setup errors and speeds commissioning |
| Output Indicator | Orange LED | Simple, quick verification of sensor activity |
| Typical Lifetime (MTTFD) | Over 1,500 years | Extremely high reliability for long-term use |
Download SICK WTB8-N2131 (6033206) Datasheet
| Commercial Data | Details |
|---|---|
| EAN Number | 4047084163494 |
| Weight | 56 g |
| Country of Origin | China |
In packaging environments, products often move rapidly and differ in color, finish, and shape, which can cause unstable readings with ordinary sensors. The WTB8-N2131 handles this challenge with its stable background suppression, ensuring it responds only to the intended product and not conveyor surfaces or equipment behind it. Its quick reaction time allows it to register even small items traveling at high speed, while the visible light spot helps technicians align the sensor accurately during setup. This reliability supports critical tasks such as detecting passing cartons, confirming product spacing, and verifying item presence before labeling, sealing, or scanning operations.
Robotic systems often encounter difficulty identifying slim, dark, or shiny parts due to inconsistent reflections and varying object geometry. The WTB8-N2131 is well suited for these applications thanks to its adjustable sensing range and precise optical control, allowing integrators to tailor detection to compact workspaces. Its small footprint makes it easy to mount near robotic grippers or fixture points without interfering with movement. With a high switching frequency, the sensor keeps pace with fast robotic cycles, helping the robot identify objects accurately before gripping. This reduces placement errors and enhances efficiency when handling electronics components, molded parts, or lightweight assemblies.
In distribution centers and production facilities, conveyors move a variety of items that may differ in size, reflectivity, or surface texture. Some objects—especially darker plastic bins—can be difficult for standard photoelectric sensors to detect reliably. The WTB8-N2131 overcomes these issues by maintaining consistent detection regardless of surface finish and by ignoring reflective conveyor elements behind the target. Its durable construction withstands dust and vibration, making it suitable for busy logistics environments. By ensuring accurate detection as items pass through sorting points, diverters, or accumulation zones, the sensor helps maintain steady flow and reduces stoppages caused by misreads.
Small automated assembly units require sensors that fit into confined areas while still delivering precise results. The WTB8-N2131’s slim design allows it to be installed close to tooling or mechanical guides without causing obstructions. It detects small components—such as clips, inserts, or fasteners—even when their surfaces vary in gloss or color. Operators can fine-tune the detection distance to ensure the sensor responds only when the part is correctly positioned, preventing accidental triggers from machine surfaces. With rapid switching and stable output, it supports reliable step-by-step verification, enhancing assembly quality and reducing rework in tightly controlled production processes.
| Category | Accessory Name | Part Number | Compatibility / Benefit |
|---|---|---|---|
| Mounting Accessory | BEF-W100-A | 5311520 | Direct fit for W8 series; durable and secure installation |
| Mounting Accessory | BEF-KHS-N08 | 2051607 | Flexible angle adjustment; compatible with W8 and multiple SICK sensor families |
| Mounting Accessory | BEF-KHS-N11N | 2071081 | Rigid mounting ideal for demanding industrial environments; works with W8 and related series |
| Cable / Connector | STE-0803-G | 6037322 | Secure wiring connection for compact sensor installations |
| Cable / Connector | YF8U13-050VA1XLEAX | 2095884 | Suitable for general automation zones; flexible, easy to install |
| Cable / Connector | YF8U13-050UA1XLEAX | 2094788 | Ideal for robotics, oily areas, and drag-chain applications |
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