The VIAFILL reagent dispenser features a touch screen graphical user interface for simplistic programming of repeat dispenses, variable volume dispenses and custom programming. Users can easily alternate between 8 and 16 channel dispensing cassettes for rapid filling of 6 to 1536 well plates. The addition of the stacker allows the utilization of 25 and 50 plate chimneys for filling bulk quantities of both non-lidded and lidded plates.