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On what principle do PCWI Porosity Detectors operate?

April 26, 2017Detectors operate pcwi porosity Principle

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On what principle do PCWI Porosity Detectors operate?

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A1. The unit is a low frequency high voltage detector that delivers a stabilized pre-set pure DC output via a probe to an inspection electrode. As the electrode moves over the coating surface, if it encounters a pin hole or bare spot, a small current flows actuating a visible (non-hazardous) spark at the point of contact and a visible and audible alarm in the unit. A neon alarm in the probe handle provides 360 visibility to the user.