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Inspection Instruments » Porosity Pinhole Testing
PosiTest HHD

High voltage Holiday Detector

  • This instrument detects pinholes, holidays and other discontinuities using pulse direct current (DC) technology.
  • Complies to ISO 29601, ASTM D4787/D5162/G62, AS3894.1 and NACE SP0188/SP0274/SP0490.


  • The ergonomic and lightweight design provides easy all day long use, diminishing user fatigue.
  • Regulated pulse DC voltage output that doesn’t change under load; voltage accuracy ±5%.
  • Voltage calculator feature. The user chooses one of 11 international standards and enters the coating thickness to automatically calculate the right test voltage.
  • Extensive electrode options. The operator can use it with a wide range of rolling spring and flat wire brush electrodes or the user can use the device with electrodes from other producers with optional standard adaptors; Custom sizes are available on request.
  • Long Form Certificate of Calibration included with each instrument.


PosiTest HHD High voltage Holiday Detector - Testing Coatings for Pinholes and Voids