Holiday Detectors

ABQ Industrial offers an advanced range of professional Holiday Detectors and porosity testing instruments from industry-leading manufacturers including DeFelsko, PCWI, and ElektroPhysik. Engineered for corrosion control engineers, pipeline inspectors, tank liners, and quality assurance inspectors, these non-destructive instruments locate microscopic pinholes, voids, cracks, and holidays in protective coating systems before premature corrosion can attack the underlying metal or concrete substrate.

Whether your inspection protocol requires low-voltage wet sponge testing on thin paint films under 20 mils, high-voltage continuous DC testing on heavy-duty pipeline coatings and storage tanks, or high-voltage pulse testing on damp or conductive thick membranes, our catalog delivers the exact voltage regulation, safety triggers, and standards compliance (ASTM G62, ASTM D5162, NACE SP0188, ISO 14654, ISO 8289) required for certified anti-corrosion inspection.

Holiday Detection Applications by Voltage & Coating Thickness

Selecting the proper Holiday Detector depends directly on your total dry film coating thickness and dielectric insulating properties:

Low-Voltage Wet Sponge Testing (Thin Coatings & Linings up to 20 mils / 500 µm) For thin barrier coatings where high voltage could damage the film or where safety regulations restrict high-voltage spark testing, low-voltage wet sponge detectors utilize capillary action and wetting agents to detect pinholes. Target Applications: Thin organic coatings, tank interiors, chemical linings, and thin paint systems up to 500 µm (20 mils). Recommended Solutions: The DeFelsko PosiTest LPD Low Voltage Pinhole Detector, featuring multiple voltage output options (9V, 67.5V, 90V), ground-sense verification, and ergonomic sponge wand accessories compliant with ASTM G6, ASTM G62, ISO 8289-A, and NACE SP0188.

High-Voltage DC Spark Testing (Thick Pipeline, Tank & Structural Coatings) For thicker anti-corrosion barrier coatings, high-voltage direct current (DC) Holiday Detectors generate adjustable voltages to jump air gaps at pinholes and holidays, producing both audible alarms and visible sparks. Target Applications: Production pipeline coatings, structural steel tank work, valves, and industrial immersion linings. Recommended Solutions: The DeFelsko PosiTest HHD High Voltage Holiday Detector (featuring pulse/continuous DC up to 35 kV and an integrated voltage calculator) and the rugged PCWI Compact DC High Voltage Holiday Detector (DC15 / DC30) (delivering regulated DC outputs up to 15 kV or 30 kV with clip-on LiFePO4 battery packs).

High-Voltage Pulse Testing (Damp, Contaminated or Highly Loaded Coatings) When testing thick protective linings on concrete, damp structures, or carbon-loaded conductive coatings where continuous DC current drains prematurely through moisture paths, high-voltage pulse detectors maintain reliable fault detection. Target Applications: Concrete containment structures, thick elastomer linings, and moisture-prone industrial environments. Recommended Solutions: PCWI Compact Pulse High Voltage Holiday Detectors (P20 and P40) and specialized pulse models from our high-voltage catalog.

Holiday Detector Selection Guide (Featured Models)

Click any model name in the reference table below to view individual specifications, pricing, and ordering options across all active instruments in our Holiday Detectors catalog:

Key Technical Capabilities Across This Category

• Regulated Voltage Outputs: Advanced electronic Holiday Detectors maintain stable test voltage under load, ensuring that voltage does not sag when testing thinner film areas or encountering ground capacitance.
• Multi-Standard Compliance: Built-in calculation features and preset test voltages align automatically with global standards including ASTM D5162, ASTM G62, NACE SP0188, ISO 14654, and AS3894.1.
• Enhanced Operator Safety Features: Incorporates safety triggers (press-and-hold activation), low-current output limits to prevent hazardous shocks, and shock-proof internal insulation.
• NIST-Traceable Calibration: Every unit ships with a protective carrying case, grounding leads, and a NIST- or manufacturer-traceable calibration certificate.