Flocculators with independent positions that allow standard conditions to be adopted for jar test, that are the basic requirement for reproducible results. The FC S Series is a multiple stirrers with reproducible stirring speeds allowing standard conditions to be met during analysis, a basic requirement in order to obtain reliable and repeatable results. FC S Series is available in two configurations: FC4S, with 4 independent positions FC6S, with 6 independent positions FC S Series has been manufactured with a strong metallic frame with an epoxy painting purposely studied to offer a high protection degree against chemical and mechanical corrosion. The stainless steel stirring rods are adjustable in height by a self blocking chuck. Rotation speed is controlled by a gear motor powered by direct current controlled electronically by a microprocessor. From the front panel its possible to select among 9 different speed settings (10-15-30-45-60-90-120-150-200 rpm) for each position, making the instrument totally flexible. The state-of-the-art technology ensures maximum convenience and makes the unit maintenance-free.