Main parameter of grain quality, primarily wheat and barley, is their protein content. Based on this, the selection into grains for human or livestock food, as well as trade, is carried out. The grain protein content is determined by protein measuring instruments for cereal grain and oilseeds.

Directorate of Measures and Precious Metals performs type evaluation and testing of these instruments using reference materials - samples of cereal grains and oilseeds, in accordance with OIML R146:2016. The protein content in RMs is determined according to SRPS EN ISO 20483.

In this way, DMDM ​​provides reliable, accurate and traceable measurements of protein content in grain in Serbia, guaranteed by legal metrological control of these instruments.