Unter the term of raw material and ore we have summerized several materials which are e.g. used for the extraction of iron. If we stay tuned to this example, we should mention e.g. iron ore, coal, olivine, lime, quartz sand, sinter-/greenmix, etc. The residual moisture is as important for the quality of sintering and melting processes as it is for e.g. the production of feeding stuff. ACO moisture measuring sensor are successfully used in many different kinds of production processes. In the field of extracting iron (in sinter plants) they could convince by its robust construction, the easy handling and the extremely high reliability.