Low-voltage pinhole Detector

A low-voltage pinhole detector identifies discontinuities on coating surfaces by applying a low-voltage current. When the electrode contacts the coating, a current pathway forms at pinhole locations, triggering audible and visual alarms. It is used to detect minute defects in anti-corrosion coatings on metal substrates, ensuring protective effectiveness.
Selection
When selecting, consider matching the substrate's conductivity with the detection voltage, and opt for waterproof models in humid environments. The coating thickness determines the shape of the electrode brush—use a flat brush for flat surfaces and a spherical brush for welds. Ensure the device includes grounding protection and voltage adjustment features, and choose a portable model for on-site use.
type
Coated Film thickness
Voltage range

Terms

Standards

Instruments

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

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

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

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

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

Conductivity Detector cell constant K = 0.1, built-in temperature sensor real-time sensing sample temperature, suitable for low Conductivity Detector liquid measurement.

$ 314.00

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

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

$ 232.00

With 0~ 500μm thickness detection capability, using 9V/67.5V/90V multi-voltage output, automatic self-calibration and sound alarm function, meet IP65 Protection Rating to ensure durability.

$ 622.00

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

$ 186.00

Using 2-wire method and 3-wire method measurement, Ground Voltage Measurement range 0~ 200V, Ground Resistance Measurement range 0~ 1999 Ω, Response Time about 5 seconds, with continuous measurement and overload protection function.

$ 159.00

Fillable internal reference solution design with circular Glass sensitive membrane and annular ceramic liquid junction for low Conductivity Detector samples ensures measurement Stability and accuracy.

$ 330.00

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