The manufacturer of the 600E Multisolvent Delivery System, Waters is Waters. Refurbished Waters 600E multisolvent delivery system complete with pump (p/n WAT062349) and controller (p/n WAT055730). The Waters 600E Pump with Controller features 5-inch CRT Display, program tables with flow rate, gradient, timed events, 15 time-based step/table, 15 table capacity, and time-based multi-method capacity. It includes linking program table. The Waters 600E Pump is an interactive, microprocessor-based liquid chromatography system that generates gradients using up to four solvents. Solvent metering and mixing is performed on the low pressure, or intake, side of the solvent delivery system, with some additional compositional mixing occurring at high pressure on the delivery side.