Scientific apparatus and instruments for laboratories, optical analysis, weighing, measurement and control, namely, apparatus for measuring the quality parameters of grains and seeds, in particular, oil seeds, legumes, maize, malt, cereals and starch plants, flour feed and pet food; electronic testing, control and measurement equipment for testing, controlling and measuring of moisture, bulk density, and specific weight of granular, particulate, and pellet-shaped products, in particular, agri...