Model PDS-100 uses precision stepper motors to control valveless piston pumps and offers range of 500 nl per dispense to 2 lpm continuous flow. It accommodates all FMI pump sizes in both fixed and adjustable displacement configurations. Pump heads are mounted to control unit, which is housed in rugged anodized aluminum enclosure that has LED readout to display menu driven programming, as well as membrane switches for navigating through programming steps.