Wet Sponge Holiday Detector


The M/1S Holiday Detector has an ergonomic design with a twist lock ground cable. It also has a strong fiberglass wand, a large sponge and a plastic sponge holder. This instrument conforms to standards for low voltage holiday detection: NACE International RP0188 ASTM D5162-A. The detector is incredibly strong and the lightweight wand material reduces fatigue; it won’t bend. New sponge material is thicker and stronger while the sponge holder is plastic and will not damage coatings.



  • Regulated 67.5v DC Output
  • Wet Sponge-type holiday detector
  • Push button calibration check
  • 2 Resistance settings
    • 80k Ω for tanks and pipe
    • 90k Ω for coatings on concrete
  • Use on thin film coatings
  • Non-destructive
  • Battery operated (9v)
  • All in One "Stick" type
  • Impact resistant plastic case
  • Stainless steel hardware
  • Very tough fiberglass wand handle
  • Long life ground cable
  • Use on thin film coatings on conductive substrates such as tanks, concrete, etc.
  • Item No. HD-M/1S
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