High Voltage DC Porosity Detector


The PCWI Compact Holiday Detector is a High Voltage DC Porosity detector also known as holiday detectors, spark testers, porosimeters or jeepers. These are used to ensure the longevity of coating systems by locating pin holes, air bubbles, and porosity in non-conductive coatings on conductive substrates, including concrete.


  • Used for detection of coating porosity (pin-holes, or holidays) in dielectric (insulation type) coatings on conductive substrates, including concrete.
  • Suitable for Production Pipeline Coating operations, Tank-work and Structures. Ideal for use on storage tanks valves and pipelines.
  • Incorporating momentary-on and continuous-on switches (mounted on the front panel), allowing the units to be switched on momentarily for safety, or run continuously.

In compliance with the requirements of :

  • AS3894. 1-2002 and Nace Standards: SP0490-2007; RP0274-2004 & SP0188-2006