The Smooth-flo is a unique valveless dispensing and metering system that utilizes dual Fluid Metering pumps precisely synchronized to eliminate pulsation typically present in other piston pump designs. Pump heads are integrally mounted to the control unit, which includes stepper motors, drivers and programmable electronics housed in a rugged anodized aluminum enclose. The Smooth-flo is intuitive, menu-driven and uses convenient front-panel membrane switches and a large LCD display for programming. The system features Pulse-Free fluid delivery down to 15 uL/min continuous flow. The precision dual stepper controlled pumpheads are factory calibrated to the users flow range. The Smooth-flo PDS100 System offers RS485, 4-20 mA, 0-5V and 0-10 V electronic control interface for connection to process sensors, PLC and PC control systems. The rugged anodized aluminum enclosure is suitable for wall mounting or bench top installation in the laboratory or production areas.