The HD-104 is a portable low-voltage wet-sponge holiday detector for locating pinholes, gaps and coating damage in electrically insulating coatings applied over conductive substrates. It is suited to coating-quality checks on tanks, pipelines and fabricated metal structures where the coating thickness is up to 500 µm.
Key features
- Selectable 9 V, 67.5 V and 90 V test voltages
- Automatic sensitivity calibration and voltage checks
- Visual and audible indication when a coating discontinuity is detected
- Low-battery indicator
- Integral or separate wand operation
- Interchangeable wand accessories and large standard sponge
- Rechargeable lithium-polymer battery
Applications
- Protective-coating inspection on metal tanks and pipelines
- Quality control of thin anti-corrosion coatings
- Locating holidays, pinholes and mechanical damage after coating application
- Inspection of coated conductive structures before commissioning or repair
Specifications
| Detector range | 9 V: up to 300 µm; 67.5 V: up to 500 µm; 90 V: up to 500 µm |
| Sensitivity | 9 V: 90 kΩ ±5%; 67.5 V: 125 kΩ ±5%; 90 V: 400 kΩ ±5% |
| Voltage accuracy | ±5% |
| Battery | Rechargeable Li-polymer, 11.1 V / 1100 mAh |
| Power consumption | ≤0.5 W |
| Main-unit weight | 500 g |
| Main-unit dimensions | 290 × 53 × 53 mm |
| Battery charger | 12 V DC |
| Sponge size | 170 × 70 × 30 mm |
| Probe rod length | 195 mm |
| Earth lead length | 4 m |
Manufacturer-published standards references
Huatec lists ASTM D3894.2, ASTM D5162 Method A, ASTM G6, ASTM G62 Method A, BS 7793-2, ISO 8289, ISO 14654 and NACE RP0188. Confirm the required standard edition and project acceptance criteria before specifying the instrument for compliance work.
Standard supply
- HD-104 main unit
- Standard wand and flat sponge
- Earth lead
- 12 V DC charger
- Carrying case
- Operating manual and warranty card
Download the Huatec HD-104 wet sponge holiday detector datasheet (PDF)