About Electronic Leak Detection

Electronic leak detection can be the most effective option to detect leaks, the earth lead from the PD holiday detector unit is connected to a convenient earth point on the structure. A high voltage *calculated against the membrane thickness* is applied using an electrode to the dry surface of the membrane. When there are no faults present the membrane acts as an insulator by stopping the flow of current out of the unit. When the electrode passes over a fault, the high voltage jumps the gap between the electrode and the conductive layer under the membrane, causing a current to flow. The audible and visual alarm on the unit will alert the operator who will then mark the points in need of repair. A written report is issued on completion of the survey with detailed findings.