X-Ray sensor for blown film extrusion

Thickness Gauges for Barrier Film Extrusion

Measuring the total thickness of multilayer barrier films requires reliable, high-precision technologies suited to the demands of continuous production. X-ray sensors measure the total thickness directly at the film bubble — immediately after the die, where the film is still hot and fully formed — delivering a comprehensive, non-contact thickness profile across the full circumference at line speed. Capacitive contact sensors, positioned downstream at the cooled and flattened film, complement this by providing highly accurate total thickness measurements once the film has reached its final, dimensionally stable state. Together, both technologies enable continuous real-time feedback to the die control system, ensuring tight thickness tolerances, minimizing scrap, and replacing manual offline sampling with full inline documentation — essential for the strict quality requirements of modern barrier film production.

K-XRAY Rotomat KT 3G

K-XRAY Rotomat KT 3G - Online thickness gauge for barrier film extrusion
Quick Facts
  • Radiometric thickness measurement using X-ray backscattering  (Unique feature)
  • Largely contactless thickness measurement on the cylindrical film bubble
  • Suitable for barrier films made of PE, PP, PA, EVOH, TPU and comparable materials
  • Temperature controlled air gap between sensor and film (Unique feature)
  • Faster profile aquisition compared to gauges located after the nips

S-100 Twin

S-100 Twin - Thickness gauge for double bubble extrusion
Quick Facts
  • Largely contactless thickness measurement after the nips
  • Suitable for barrier films made of PE, PP, PA, EVOH, TPU and comparable materials
  • For tacky films
  • Also available in a version for measuring the thickness of films for medical applications (e.g., for blood bag films)
  • Integrated film width measurement and torsion compensation