Leak tightness tests using the electron flow - measuring technique


An area on the flat roof is marked with a wire loop and subsequently slightly moistened. Our transmitter (the plus pole having previously been connected to the building’s earth) supplies pulses of electrons to the roof’s upper skin. Due to being earthed, the flow of electrons is drawn from the leak and flows to the building’s earth.

Our digital receiver locates the drop in the electron flow and shows the direction to the leak. Even readings taken through a layer of gravel with paving or greened roofs provide reliable results.

We use our specially developed FDO 4.5 monitoring system that has proven itself for years. Our daily use has continuously shown us new opportunities for improvement, and thus we continuously improve our instruments.








Do you have a seemingly untraceable leak ? Call the Lümmen-Team! We are not only manufacturers, but also a service providers.


Our specialists will also find the weak points of your roof:  customer service info@luemmen-messtechnik.de