The HUATEC HD-106A/B/C series AC/DC Knob Type Intelligent Frequency Conversion High Voltage Holiday Detector is an advanced instrument for detecting pinholes, cracks, and defects in non-conductive coatings on conductive substrates. This portable device features intelligent frequency conversion technology and is essential for quality control in anticorrosive engineering applications.

• Oil and gas anticorrosive facilities, pipeline companies, and construction quality inspection
• Gas and water company pipeline inspection and maintenance
• Shipbuilding, petrochemical plants, machinery factories, enamel production, and bridge engineering
• Pipeline transportation company anticorrosion layer quality assessment

• Military-grade gold-plated connectors for reliable connections
• Rugged ABS casing with waterproof membrane keyboard
• AC/DC dual power supply with automatic switching capability
• Large capacity lithium-ion battery pack (12V)
• Intelligent frequency conversion technology suitable for humid environments
• Digital LCD display for battery voltage and output high voltage
• Acousto-optic alarm (86 dB, 1500Hz) for defect detection
• Overload protection and self-calibration functionality
• Detection capability on wet or muddy surfaces with slight conductivity

The holiday detector applies pulse pressure to conductive insulating coatings on substrate surfaces. When pinholes or defects are present, the air gap is punctured, creating spark discharge that triggers the acousto-optic alarm system, enabling precise quality assessment of anticorrosive layers.

Main unit, high voltage generator, 2-meter probe wire, grounding wire, probe brush, battery, charger, strap, instrument case, HUATEC calibration certificate, and operation manual.

Arc brush, flat brush, circle spring brush, pipe inner surface brush, and additional batteries.