SICK WF120-60B410 Infrared Fork Sensor for Label Detection

The Applications for SICK WF120-60B410

1. High-Speed Label Gap Detection on Packaging Lines

In automated labeling systems, accurate detection of the gap between consecutive labels is essential for precise placement. The WF120-60B410 is installed around the moving label web so both the label and liner pass through the fork opening. Its infrared sensing principle and ability to detect very thin edges allow stable triggering even at high web speeds. Sensitivity can be fine-tuned directly on the sensor to accommodate different label materials and adhesives. This helps prevent missed labels, incorrect positioning, and unnecessary rejects, improving overall line efficiency and reducing material waste during continuous production.

2. Registration Mark Detection in Printing and Web Converting

Printing and converting machines rely on consistent detection of registration marks to synchronize cutting, sealing, or folding processes. Mounted directly over the moving web, the WF120-60B410 provides a fixed optical path that minimizes alignment drift caused by vibration or machine movement. Its fast response supports high-speed printing, while selectable switching logic adapts to different mark and background combinations. As a result, manufacturers achieve more accurate print-to-cut alignment, improved repeatability, and reduced scrap when running long production batches or frequent job changes.

3. Hole and Slot Detection in Die-Cut Materials

Die-cut films, tags, and technical laminates often include holes or window features that must be detected for indexing or inspection. The fork-style design allows the material to pass through a defined sensing zone where solid areas block the beam and cut-outs allow it to pass. The WF120-60B410 maintains stable performance even when material thickness or transparency varies. This enables reliable position feedback for downstream automation steps, reducing indexing errors and ensuring consistent part orientation during high-volume manufacturing.

4. Double-Sheet Detection in Sheet Feeding Systems

In carton and insert feeding systems, accidental double-feeds can lead to jams, mispacks, or quality issues. The WF120-60B410 can be positioned at critical feed points to monitor sheet edges as they enter the process. Its high switching speed allows early identification of abnormal overlap patterns, while simple adjustment supports fast changeovers between materials. By detecting double-sheet conditions before they propagate through the machine, the sensor helps reduce downtime, protect equipment, and maintain consistent output quality in high-throughput operations.