SICK WTB8L-P2231 Laser Sensor with Background Suppression

SICK WTB8L-P2231 Laser Sensor – High-Precision Detection with Background Suppression

The SICK WTB8L-P2231 Laser Photoelectric Sensor is designed to deliver stable and accurate detection in compact machine layouts where space is limited. Using a fine red laser spot and advanced background suppression, it accurately identifies small or low-reflective objects across a 40–300 mm working distance. Its lightweight housing, quick installation features, and rapid response make it suitable for fast production environments. The sensor helps solve common issues such as unreliable counting, inconsistent detection of dark items, or sensitivity to surface variations, making it a dependable choice for high-speed industrial automation.

The SICK WTB8L-P2231 is built to maintain reliable switching even when objects vary in color, texture, or size. Its tightly focused laser spot enhances precision when detecting very small parts or targets moving quickly through a process. A stability indicator helps technicians fine-tune the sensing point, reducing setup time and maintenance. With its durable, sealed housing and resistance to common industrial conditions, the sensor integrates seamlessly into conveyors, compact assembly stations, and robotic systems. Users benefit from more consistent production flow, fewer detection errors, and improved efficiency in tasks such as quality checks, object presence detection, and part positioning.

Why SICK WTB8L-P2231?

The SICK WTB8L-P2231 stands out for its ability to detect tiny or fast-moving objects with a level of accuracy usually reserved for larger, more expensive sensors. Its compact body hides a powerful laser system designed to stay stable even when production lines vibrate or lighting changes. This model is chosen when manufacturers want precision without sacrificing space or speed.

What problem does it solve?

The WTB8L-P2231 eliminates inconsistent detection caused by color variations, reflective materials, difficult shapes, or miniature components. It solves the classic issue of sensors miscounting items or triggering at the wrong moment, especially in fast-paced automation. By providing sharp, reliable switching, it ensures smooth production flow and prevents costly downtime or scrap caused by missed detections.

Key Features & Specifications – SICK WTB8L-P2231 (Part Number: 6033221)

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Commercial Data – SICK WTB8L-P2231 (Part Number: 6033221)

The Applications of the SICK WTB8L-P2231 Laser Sensor

1. High-Speed PCB Assembly – Detecting Tiny Electronic Parts

In compact PCB assembly lines, components often vary widely in size, color, and surface reflectivity. The WTB8L-P2231 excels in this setting because its narrow laser spot can identify very small parts like chips, resistors, or micro-connectors moving quickly along the conveyor. The background suppression prevents false triggers from dark circuit boards or nearby traces. Its compact build allows it to fit between densely packed tooling areas without obstructing other equipment. With rapid response timing, it ensures accurate counting and placement confirmation, reducing assembly defects and improving overall production flow.

2. Packaging Automation – Confirming Transparent Lids and Film

Many packaging lines struggle with detecting clear or glossy items such as plastic lids or thin films. The WTB8L-P2231 solves this by using a consistent laser spot that does not rely on reflectivity, allowing it to distinguish transparent materials from the conveyor surface. Its stable background suppression keeps it from reacting to shiny metal machines or variable belt colors. This helps catch missing lids, misaligned covers, or faulty sealing materials before the product moves to the next stage. The sensor’s small housing fits cleanly into tight packaging frames, keeping machine layouts simple and efficient.

3. Automated Small-Part Sorting – Counting Irregular Items

Sorting systems that handle small items—like springs, screws, or miniature bearings—require extremely reliable detection due to unpredictable shapes and fast movement. The WTB8L-P2231’s fine laser spot and fast switching frequency make it well suited for this environment. It identifies each item as it passes through chutes or narrow guides, even when parts overlap or spin unpredictably. The strong background suppression ensures stable detection despite dust, vibration, or metallic surfaces nearby. This results in consistent sorting accuracy and minimizes the risk of items being misrouted.

4. Robotic Handling – Verifying Picked Items at the Gripper

Robotic pick-and-place systems benefit from quick confirmation that a part has been successfully gripped before the robot proceeds to the next action. The WTB8L-P2231 can be mounted close to the end-effector, where its compact size and focused laser spot detect even the smallest objects in the gripper. Background suppression ensures that the sensor sees only the target object, not the metal jaws of the gripper. With its rapid response time, the robot receives instant confirmation, keeping cycle times fast and reducing handling errors. This improves throughput and increases overall system reliability.

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