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In packaging and labeling lines, label detection is one of the most critical points that affects both speed and quality. If the labels are transparent, glossy, metallic, or have a variable design, the optical solution may require frequent readjustment. Telemecanique XUVU04 is a ultrasonic sensor in a fork-shaped design, intended for reliable label sensor operation regardless of color, reflectivity, or ambient lighting.
Telemecanique XUVU04 is a fork sensor (fork-type) with ultrasonic detection, which distinguishes a label from a gap on the label web. The sensor is usually mounted in the label feed area so that the applicator or PLC receives an accurate signal for the labeling operation (e.g., right at the peel plate).
Why ultrasonic sensor is a smart choice for labels: detection is practically independent of the label’s optical properties (color, background, reflection) and ambient lighting, which often affect photo sensor performance.
XUVU04 as a label sensor is most commonly used in:
The Telemecanique XUVU04 is designed to be compact so it can be installed where other fork sensors do not fit. The manufacturer emphasizes edge installation, which in practice helps achieve a more stable signal and reduces web drift.
Yes — as ultrasonic fork sensor it is also suitable for label counting, as the most important thing for counting is reliably detecting “label/gap” regardless of the design. XUVU04 material mentions a very small gap that it can detect.
Typical tasks in label production
Task | How the label sensor (XUVU04) helps | What to consider |
|---|---|---|
Label count tracking | Pulse for each label/gap | PLC counter speed and filters |
Roll remainder control | Counting to the limit | Convenient automation of roll change timing |
Packing verification | “Is the count correct?” | If 100% quality QC is needed, additional control may be required |
Automatic stop | Stop signal when count is reached | Fewer errors and less waste |
What are the main differences between a photo sensor and an ultrasonic sensor.
Criterion | Photo sensor (optical) | Ultrasonic sensor (Telemecanique XUVU04) |
|---|---|---|
Transparent/metallic labels | Often difficult to set up | Designed for transparent/opaque labels |
Sensitivity to color/glare | Can be high | Low (optics usually not decisive) |
Ambient lighting | Can affect | Practically unaffected |
Mounting in narrow places | Depends on model | Compact fork, designed for tight spaces |
Diagnostics/remote setup | Depends on model | IO-Link variants and HMI |
Unified XUVU04 sensor parameters.
Parameter | Value / note |
|---|---|
Response time | 440 µs |
Minimum gap | up to 1 mm |
Web speed (in detection context) | up to 240 m/min |
Protection class | IP65 |
Certifications | CE, UKCA, cULus |
Fork dimensions (example from variants) | fork width 2.6 mm, fork depth 42.5 mm |
Outputs / variants | PNP, NPN or push-pull with IO-Link; M8 / 2 m cable / M12 pigtail 2 m |
For harsher environments | For metal housing, manufacturer indicates XUVU06 |
Power supply (V), current consumption and detailed IO-Link must be checked in the specific model datasheet.
Telemecanique XUVU04 is a compact ultrasonic sensor and a reliable label sensor for packaging lines, especially for transparent/shiny labels, small gaps and high speed. The fork design allows mounting in narrow spaces, while IO-Link and HMI help to set up and monitor the process faster.
If you want to clarify what fits your specific situation, ZTF Lāsma team can provide more information about Telemecanique XUVU04 (and alternatives in the XUVU series) and help you find the most suitable solution for your labeling or label tracking automation needs.
