Holiday Detector

Definition - What does Holiday Detector mean?

A holiday detector is a device used to inspect stationary equipment or a metallic surface to ensure structural integrity and assist with corrosion prevention efforts. Holiday detectors are commonly used to evaluate the rate of premature coating failures on a metallic surface by sensing the presence of coating defects and flaws (holidays) and the porosity of the coating.

Corrosionpedia explains Holiday Detector

Holiday detectors are used to inspect pipelines, processing plant equipment and other metal surfaces by being physically moved along the surface being inspected. They are used to evaluate properties such as protective coating thickness, cracks, and salt and moisture concentrations.

There are two main types of holiday detectors:

  1. High voltage detectors - Used to inspect thick surfaces
  2. Wet sponge detectors - Used to inspect thin surfaces
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