HomeISOTEST® actIndustrie SolutionsStationary Inspection of Pipe Liners

Stationary Inspection of Pipe Liners – ISOTEST® act Industry Solution

Due to the fact that the rehabilitation of pipeline systems is gaining more and more importance, quality control plays an important role in this sector. Trained and qualified personnel as well as standardised selection and testing of the materials used are crucial for success.


Needle-felt pipe liners up to a thickness of 6 mm can safely be tested for cracks or pores with the stationary ISOTEST® act holiday detectors. Thanks to the special test technique using high voltage, a fully automated testing of continuously produced pipe liners is possible.


We shall be pleased to advise you on the configuration of your testing system.

Our recommendation

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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