Holiday Detector

Holiday detectors are essential testing devices used in coating inspection to detect pinholes, voids, and discontinuities, commonly referred to as holidays, in protective coatings applied to metal surfaces. These flaws, if undetected, can lead to corrosion and structural damage over time. Holiday detectors work by applying a high-voltage electric current over the coated surface; if the current finds a path through a flaw, it signals a defect. Widely used in pipeline, storage tank, and marine coating industries, these detectors ensure quality control and long-term durability. Both low-voltage and high-voltage models are available depending on coating thickness and application requirements.