System automatically collects the sample material from the wagon train or car trailer, measured moisture clustered sample with an accuracy of 1% and draws a sample of the vehicle from which it was collected. System allows you to test the moisture content of 2-30% of the following types of biomass: rapeseed meal, sunflower pellets, pellets, sawdust, straw pellets. System was built based on the driver Siemens S7-1200.