M-thick interferometric optical sensors allow to measure total thickness of glass panels, tubes and objects, both in production lines and in QA/QC laboratory. Measurements are contactless and provide micrometric accuracy. APPLICATIONS Sensors measure any transparent or semi-transparent material, including coating. Main applications for glass industry are: • TFT e LCD panels • thin glasses for electronics • pharmaceutical tubes and lighting tubes • glass plates for watchmaking ADVANTAGES • the reflection approach doesn’t require opposite head • high accuracy • total safety for operators (non-ionizing and non-radioactive light) • easy to use • multiple-head layout • quick integration in laboratory and production line