Two Aladdin pumps from WPI, when daisy-chained, are more efficient and affordable than any other dual syringe pump on the market. Two Aladdins (Al-2000) will perform as a dual infusion/withdrawal pump, a double pump for infusing at different rates, a push/pull pump with one infusing and one withdrawing at the same or different rates, two independent pumps, or a master/slave pump. One Aladdin can even control the second for continuous pumping with optional check valve set.Up to 100 pumps can be daisy-chained together via RS232 network.