The new ATEX certified leak detector introduced by Alvi Technologies indicates the occurrence of non-conductive or conductive liquid leakages.
Capacitive plate sensors are installed on the floor with the sensor side facing downwards. Each capacitive plate sensor is equipped with two round PCBs featuring gold-plated concentric strip conductor rings that function as screening electrodes.
Two such capacitive sensor elements are provided for symmetry. As soon as a non-conductive liquid comes into contact with the rings and the spaces of one or both capacitive sensor elements, the capacitance between the electrode changes and so does the switching status of the leakage detector.
If a conductive liquid is present, the rings of the capacitive sensor element are conductively bridged, resulting in a change in the switching status of the leakage detector.