SDF Versatile sand-milling dispersing-agitator (Frequency Control) is a new product designed by our company. It concentrates sand-milling, dispersion and agitation versatile equipments functions on this new products, it is ideal for chemical industry's laboratory. It adopts motor of frequency control, heating is lower, there is no need for carbon brush; Frequency converter adopts multiloop frequency-changer speed button, direct digits display axis revolution, it is easy to operate; it is equipped with sand-milling disc、dispersing blade and agitating blade. It can fit different testing need of laboratory.