Automatic Liquid Extraction Rotary Agitator FM-ARA-B100 Fison Automatic Liquid Extraction Rotary Agitator is a microprocessor-controlled device for liquid-liquid extraction. It features 8 separating funnels, adjustable speed 15-40 rpm, active sliding door and secure buckles. Offers positive, reverse and continuous rotations with safety features like an insulated cover, leakage and overload protection.