Protective coating checking device for fault location

摘要

The coating checking device has the non -conductive coating layer (1) positioned between a pair of conductive layers (3), with any electrical contact between the latter detected for indicating a hole (1) in the protective coating. Pref. the conductive layers each have a defined electrical resistance per unit length, with the actual resistance per unit length allowing the position of the fault to be determined via a triangulation method. The protective coating layer and the conductive layers can be combined as a foil.