A: A leak detection system can have different meanings depending on who you ask. A conductive medium below the membrane is often referred to as a “system”. The testing technology can also be referred to as a “system”. Detec considers a “system” to be an embedded, continuously monitored installation of sensors within the assembly. The sensors are designed to monitor 24/7 for either breaches in the membrane (PermaScan-I) or moisture at the vapor barrier (PermaScan-C).