When in the application there is a problem of agitation of the level (wave effect) it is necessary to put the detector in an anti wave system. Generally this system consists of a closed tube which envelops the detector and which is pierced with at least 2 holes (it is necessary to think of the evacuation of the air when the level rises).

The smaller the holes, the greater the difference between the real level and the level inside the tube: it is therefore necessary to find the right compromise: eliminating waves and good level monitoring.