HomeISOTEST® actIndustrie SolutionsStationary Inspection of Films & Foils

Stationary Inspection of Films & Foils – ISOTEST® act Industry Solution

Stationary porosity testing of films and foils – reliable and material-friendly!


Suitable products range from landfill linings and geomembranes, to so-called barrier films, to foils for packaging in the food and medical industry. Contrary to optical systems an important advantage is the fact that even transparent films can safely be tested! Further to that the testing technique using high voltage prevents an electrostatic charging of the film!


During the test procedure an electrical contact by means of electrodes is applied to the material. The choice of suitable test electrodes depends on the sensitivity of the surface. If there are any defects – even the smallest cracks or pores – in the material, a flashover occurs between the test electrode and the opposite pole, e.g. a conductive rotating drum. This flashover is detected by the control and transferred to subsequent signal transmitter or to a marking unit.

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In-plant Holiday Detector ISOTEST® act 8.0 / 35

  • test voltage 0.5 - 8.0 kV, 0.5 kV steps (ISOTEST® act 8.0)
    or 7.5 - 35 kV, 2.5 kV steps (ISOTEST® act 35)
  • high-voltage pulse technology
  • no static charging
  • testing of dirty, damp and even slightly conductive surfaces
  • up to 6 test channels – synchronisation of several devices (master / slave mode)
  • “Phantom-Grounding” – no direct grounding necessary
  • external switch-on / switch-off of the test voltage
  • adjustable sensitivity and filter functions

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In-plant High Voltage Pulse Crest Meter ISOTEST® HV conti

Permanent and external revision of high voltage testing with ISOTEST® act in-plant holiday detector systems.


  • testing of in-plant and stationary holiday detector systems ISOTEST® act according to general rules and standards
  • suitable for continuous operation (three shifts)
  • interfaces for the external documentation of test voltages and operating states
  • highest interference resistance in the measurement analysis thanks to state-of-the-art optical fibre technology

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