The sample cleaner is a sieving machine with degrater and aspiration. It is suitable for sorting almost all grain crops (e.g. oilseeds, cereals, grain legumes, etc.). The cleaning process corresponds to a normal process cleaning machine, so that the dirt content (coarse particles, fine particles, aspiration discharge) as well as the proportion of shrivelled grains and quality grains can be determined on the basis of a sample directly during acceptance. This enables the acceptance of quality grain or the rejection of lots that do not fulfill the contract conditions.