The Applications
1. Invisible Mark Verification in Flexible Packaging
On transparent or reflective packaging films, ordinary sensors often fail to detect registration marks that guide cutting and sealing. The LUT3-820 solves this by using UV light to excite hidden fluorescent marks, converting them into visible signals for precise positioning. Its 350 µs response time ensures that even high-speed packaging lines maintain consistent accuracy, preventing misalignment and wasted material without slowing production.
2. Clear Adhesive Presence Detection on Plastic Containers
When assembling or sealing plastic cartons, manufacturers often use clear or colorless glue that’s invisible under standard light. The LUT3-820 identifies the adhesive by detecting fluorescent additives in the glue, regardless of background reflection. With its IP67 zinc diecast housing and PNP/NPN output flexibility, it operates reliably in dusty or humid environments, helping quality inspectors confirm that each product is properly bonded before shipment.
3. Tamper Seal Inspection in Pharmaceutical Production
In pharmaceutical packaging, transparent safety seals on bottles or vials frequently contain fluorescent tracers for authenticity and tamper verification. The LUT3-820 accurately identifies these tracers under UV illumination, ensuring every seal is correctly applied. Its adjustable sensitivity allows it to ignore non-fluorescent backgrounds, reducing false rejects and supporting compliance with stringent quality regulations in high-speed production lines.
4. Lubricant Application Monitoring in Automotive Assembly
During bearing or gear assembly, a thin layer of lubricant is applied that includes fluorescent additives to confirm coverage. The LUT3-820 detects this coating by sensing its UV response, even on shiny metallic surfaces where other sensors struggle. Its robust construction withstands vibration and oil mist, verifying proper lubrication before assembly continues, minimizing wear-related defects and ensuring consistent mechanical performance.