Holiday Detector

Standard configuration; low Voltage wet sponge method; detecting vacuum, holiday and other discontinuous defects of metal or concrete surface coatings; automatic self-inspection certificate Voltage calibrating; adjusting Voltage output without lowering load; with headphone jack; with calibrated certificate.

Advanced configuration; low Voltage wet sponge method; with extension rod; detecting vacuum, holiday and other discontinuous defects of metal or concrete surface coatings; with automatic instrument calibrating inspection; adjusting Voltage output without lowering load; with headphone jack; with calibrated certificate.