Thermo Dionex GP50 Gradient Pump Chromatography The GP50 Gradient Pump is an integral part of a Dionex chromatography system. It is a microprocessor-based, dual-piston, variable-speed, gradient delivery system designed to blend and pump mixtures of up to four different eluents at precisely controlled flow rates. The pump can deliver the selected eluent composition iso-cratically, or as a multistep linear or curved gradient. A Digital Signal Processor (DSP) provides high speed control of pump flow and pressure. The pump is in very good operating and cosmetic condition. It is supplied with solvent baskets and bottle tubing caps and connections and power cord. The images form part of the description. It is covered by our 3 month warranty (see details below). Specification: Eluents – 1-4, 0 to 100% Pump – Dual piston, variable speed Operating pressure – 5000psi max Weight – 19kg Dimensions – 23 x 42 x 34cm (w x d x h) Electric Supply – 220-240V, 50Hz Good condition Recently de-installed from a working lab. Please note: I have been unable to carry out any extensive tests as I do not have the software but it was working prior to de-installation from the laboratory. The system can be tested prior to the sale. Contact for more information. Collection from London welcome. Free delivery within the UK.Can ship worldwide. Bank/Wire transfer accepted.