The principle of the Roller Hardness Sorting Machine lies in under certain condition, iron/steel pieces of the magnetic conductivity has a direct corresponding relationship with hardness, materials, defects etc. The instrument detect the magnetic conductivity, by the central circuit processing reflects the hardness of iron and steel pieces, materials, defects. 
Technical parameter ：
Gas source：≥0.4MPa
Environment request：-10℃~50℃
Speed：180pcs/min
Size/weight： 800*450*1840mm/50kg
