Semi-Micro HPLC Pump

PU-2085 Plus Semi-Micro HPLC Pump  Flow-rates from 1uL to 4mL/min Designed for lower flow rate chromatography, the PU-2085 and the gradient version HPG-2085 are optimised for flow rates to work isocratically and with binary gradients not only with 4.6mm columns but also 2mm and 1mm columns. 4.6mm column = 1mL/min (1.4L per day) 2mm column = 0.25mL/min (350 mL per day) 1mm column = 50uL/min (70 mL per day)   Fast becoming the standard for LC-MS applications requiring low flow-rates couple with high flow reliability, the PU-2000 series of pumps can be controlled by Masslynx and XCalibur. Ideal for 1-2mm columns and low flow rate gradients for LC-MS flow range 1µl/min to 4ml/min. Gradient HPLC from ~20uL/min. Available as PU-2085i a PEEK inert system for working with applications which are sensitive to metal ions.

HPG-2085 High Pressure Semi-Micro Binary Gradient Gradient Flow from 20uL/min to 4mL/min Combine two PU-2085 pumps to create a high performance high reliability gradient system. Also for high pressure ternary gradients High pressure mixing is stil the best way to make gradients. fast responsive gradients negligible dead volume tailored mixing according to flow-rate and solvent viscosity Using the dynamic MX-2080-31 the HPG-2085 offers a very flexible gradient pump from 4mL/minute to down below 20uL/minute without compromising dead volume or mixing efficiency.   Excellent pump performance The SSQD (Slow suction, Quick delivery) pumping method ensures the most reliable, accurate and stable solvent delivery possible. A guaranteed flow rate precision within 0.1% assures good reproducibility of retention time. Pulse-free flow assures maximum detector sensitivity. Extreme durability. Utilising ceramic plungers and an automatic plunger cleaning system assures a long, maintenance free pump life. Diaphragms located behind the plunger seals and a pair of check valves act as pumps for cleaning the plunger surface, thus avoiding the precipitation of salts from buffer solutions during intermittent operation.  Full programmability Stand alone front panel programming of 10 files with up to 64 steps/file is provided eliminating the need for external computers or system controllers. Built-in program allows either high pressure gradient operation by 2 pumps or low pressure gradient operation using one pump and proportioning valve without need of a system controller. The stand alone PU-2080 can even control a 6-solvent selection valve to allow control of complex applications such as Amino Acid Analysis. Of course full PC control is available.