PoroTest 7

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High voltage Pinhole Detector PoroTest 7

Transportable high voltage Holiday Detector to locate pores, cracks and other faults in insulating materials (e.g. varnish, synthetic material, rubber, bitumen) on conductive substrates (e.g. steel, aluminium, earth-moist concrete constructions) as per DIN 55670.

The Holiday Detector, PoroTest 7, is specially designed to test functionally critical insulating layers, e.g. inner and outer linings of tanks and pipelines in the field of petrochemicals, anti-corrosion coatings in shipbuilding, protective coatings of sewage tanks etc.

PoroTest 7 High Voltage Probe Why ? Test principle

The electronically controlled high voltage source unfailingly prevents the test voltage from exceeding and dropping below limit, a feature not provided in low-cost devices. Exceeding the limit can cause damage to the coating to be tested; dropping below the limit prevents detection of pores.

A wide range of special electrodes are available; we can also fabricate customised inner, outer and plate electrodes as per application requirement of the client.

Test principle

When scanning the high voltage search electrode smoothly over the surface, flaws are detected through spark discharge to the conductive substrate.

Test voltage can be adjusted from 500 Volt to 35.000 Volt.

The instrument has been designed for testing insulating materials from approx. 30 microns to 11.3 mm thickness.