In the category "energy" we combine several sources of energy, inter alia fossil energy sources such as lignite and hard coal, etc. as well as ashes and residues as a result of combustion. The residual moisture is an important argument in this industrial branch for several reasons. On one hand to optimize the combustion on the other hand for save loading of lignite. The texture of this material mostly is granular and pourable. The sensors are mostly implemented on or under conveyor belt and of course chutes.