Sample Tester (ST4)

The OCS Sample Tester (ST4) is a compact tabletop instrument for optical detection of irregularities and contamination in transparent and non-transparent surfaces such as plastics, steel, paper, textiles and non-wovens. It is used in the laboratories of manufacturing companies as well as in research and development centres. The system can operate in reflection or transmission mode depending on the material.


  • Reflection or transmission mode depending on the material type
  • Learning function for saving defined error types for later analysis
  • Easy access for sample exchange