What Is Online Thickness Gauge?
Direct Answer
An online thickness gauge is a sensor that continuously measures the thickness (basis weight uniformity) of nonwoven or film during production.
Key Takeaways
- An online thickness gauge is a sensor that continuously measures the thickness (basis weight uniformity) of nonwoven or film during production.
- How it works: Laser, optical or radiation-based sensors scan the web as it moves, comparing thickness against target.
- Monitoring nonwoven topsheet uniformity
- Thickness gauges are only for finished products — online gauges measure during production for real-time control
How Online Thickness Gauge Works
Laser, optical or radiation-based sensors scan the web as it moves, comparing thickness against target. Deviations trigger alarms or automatic adjustments, ensuring uniform absorbency and appearance across the roll.
Examples and Applications
- Monitoring nonwoven topsheet uniformity
- Checking film backsheet caliper on line
Online Thickness Gauge vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| Online Thickness Gauge | ||
| Online Thickness Gauge |
Limitations and Common Misconceptions
- Thickness gauges are only for finished products — online gauges measure during production for real-time control
Why measure thickness online?
Uniform thickness affects absorbency, softness and appearance; online gauging catches drift early instead of at final inspection.
References
- JP CIA (industry) - Baby diaper material: key components and their functions — 行业媒体 (accessed 2026-08-02)
- EDANA - What are nonwovens? (ISO 9092 / CEN EN 29092 definition) — EDANA (accessed 2026-08-02)