High Voltage Pinhole Tester

The high-voltage pinhole tester detects the insulation integrity of coatings or films by applying a direct current high voltage. When the needle tip contacts the material surface, the current breaks down weak points, forming visible electric sparks, which are used to locate defects such as coating pores and cracks. It is applied in quality testing for products like anti-corrosion pipelines, tank linings, and insulating materials.
Selection
When selecting, consider that the test voltage range must cover the material standard requirements, and the electrode shape should match flat or curved workpieces. The protective design ensures operational safety and is equipped with audible and visual alarms to indicate breakdown phenomena. The calibration function ensures data accuracy, and the portable structure is suitable for on-site use.
type
Coated Film thickness
Voltage range

Terms

Standards

Instruments

Measurement range up to 1000GΩ, support polarization index test and AC/DC voltage detection, with backlight display and high voltage probe.

$ 232.00

0.6KV~ 31.5KV full scale high voltage output, voltage accuracy +/- (0.1KV + 3% reading), intelligent control to ensure that the display voltage is the test voltage, pulse discharge to reduce coating secondary damage, sound and light alarm and leakage point counting function.

$ 622.00

With 500V to 5000V four output voltage, Measurement range covers 0-1000GΩ, support polarization index test and AC/DC voltage detection, maximum short circuit current 1.3mA to ensure safe operation.

$ 232.00

Measurement range of up to 99.9GΩ, support polarization index test and AC/DC voltage detection, with backlit display and overload protection.

$ 186.00

The integrated high voltage generator is used to overcome static electricity, the performance is stable and reliable, the output high voltage 2~ 30KV stepless continuous adjustable, the detection Film thickness range 0.05-15 mm, nickel-metal hydride battery power supply is suitable for field operations.

$ 583.00

Adopting high voltage detection technology, it can sensitively find defects such as coating pinholing and bubbles, equipped with sound and light alarm system, and powered by nickel battery, which is convenient for field operation.

$ 590.00

Using high voltage DC technology, the maximum detection thickness is 36 mm, the voltage range is 0-30kV fully adjustable, with current limit protective coating and Sensitivity adjustment function, suitable for metallization or slightly wet coating detection.

$ 5992.00

Glass-lined, FRP, epoxy coal asphalt coatings of different thicknesses can be mass tested by high voltage detection technology. When the coatings have defects such as pinholing and bubbles, the instrument will emit bright sparks and sound and light alarms.

$ 1230.00

0.6KV~ 31.5KV full scale high voltage output, voltage Accuracy +/- (0.1KV + 3% reading), intelligent control automatically match Coating thickness, pulse discharge to reduce secondary damage, prolong battery life.

$ 1041.00

Suitable for high voltage molding sand test, compression stroke 2.50mm, load 1500g, with average calculation and MAX Maximum latch function, support USB and Bluetooth data communication.

$ 328.00

With 5000V output voltage and 1000GΩ Measurement range, it supports polarization index testing and USB data transmission, and the backlit display is easy to read measurement results in dark environments.

$ 310.00

The use of high voltage DC technology can detect 36mm thick coatings, with current limiting function to avoid coating damage, Sensitivity adjustment to adapt to metallization or slightly wet coatings, providing stability testing current and overcharge protection.

$ 6782.00

Wide range, high resolution, with the measurement of DC voltage, AC voltage, absorption ratio and polarization index function, strong anti-interference ability, the use of shockproof, dustproof and moisture-proof structure.

$ 477.00

With automatic self-inspection certificate voltage Adjustment, detection voltage 9V to 90V adjustable, thickness range 0~ 500μm, meet IP65 Protection Rating and weight only 180 grams easy to carry.

$ 1464.00

Pulse high voltage technology, detection thickness range 0.05-10 mm, output high voltage 0.6-30 KV stepless adjustable, with sound and light double alarm and automatic shutdown function, nickel-metal hydride battery power supply easy to carry.

$ 590.00

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