Caltech Engineering Services Mumbai India manufacture and supply holiday detectors. Holiday detector is used to test and detect pinholes, porosity or flaws in insulated coatings on conductive substrates where coating have to provide an effective safeguard against corrosion. Holiday detector is portable quality control inspection instrument is used to electrically locate and fault find in defects of protective coatings. It is essential that any pinhole, porosity or flaws which will eventually lead to corrosion are detected at the earliest possible stage, preferably immediately after the coating application. Holiday detector is suitable for all types of coatings like fusion bonded epoxy, coal tar epoxy, paints, polyester, polyurethane, pipeline tapes, heat shrinks and asphalt.