Cool Defelsko Holiday Detector References. Low voltage (wet sponge) and high voltage (spark tester). Handheld wand with 1.5m insulated cable converts the detector to a wand type instrument (not for voltage > 15 kv):
Turn the positest hhd verifier on by pressing and releasing the power button. There are two types of pinhole detectors: Low voltage (wet sponge) and high voltage (spark tester).