The Auto Syringe AS 40 and AS50 infusion pumps provides accurate, continuous or intermittent infusion of intravenous solutions. Infusion rates are programmable from 0.01 to 438 mL/hr. The pump accepts standard disposable syringes from 1 mL to 60 mL in size. While the pump is running, the status display shows information about the infusion. Safety and effectiveness are reinforced by re-programmable bolus operation, titration of a dose without interruption of fluid flow. The pump includes an optional serial communication feature, which provides remote computer control and monitoring capabilities. A standard 9-pin connector allows an RS-232 communication link between the pump and the host computer.