In the present work, a conventional hydrocyclone and newly designed laboratory scale crossflow separator (CS) were evaluated and compared experimentally. Hydrocyclone and CS was compared at the very similar actual cut size values. In this condition, a finer overflow product was obtained by using CS. Imperfection value of CS was 0.22 and lower than the operating hydrocyclone. The imperfection coefficient for the classifier ranged between 0.2 and 0.5. CS was illustrated good classification efficiency as a classifier. The CS can be used as an alternative and more efficient classifier to further improve the classification efficiency of close circuit grinding operations.