• Materials with dust or fluff-like deposits
  
  
• Films with a variable level of transparency
  
  
• Light-sensitive materials

• Pulsed infrared light (insensitive to external light sources)
  
  
• No influence on the measurements by flutter of the web within the light path
  
  
• Automatic contamination message
  
  
• Optional connection for air-driven cleaning protects the lens against contamination from paper, dust or other contaminants

• Insensitive to dirt and changes in the transparency of the material
  
  
• No changes to the measured values through flutter of the web in the sensor scanning area
  
  
• Large proportional scanning band permits web center-line guiding even for relatively large web width variations
  
  
• Compensation for any interference which may be caused by external sound sources or other environmental influences

• Transparent and non-transparent materials
  
  
• Thick materials