Agilent 1100 Series G1311A Quaternary Pump

This Agilent 1100 Series G1311A Quaternary Pump is a used HPLC solvent delivery module offered in tested, functional condition. It draws from up to four solvent lines and blends them according to programmed gradient or isocratic profiles, giving labs flexibility to run complex mobile phase compositions without manual solvent changes. The pump head and seals have been checked for consistent flow and pressure stability prior to listing. Quaternary pumps like this one are the workhorse of many HPLC systems, delivering precise, reproducible flow across a wide range of applications including method development, routine QC testing, and multi-solvent gradient separations. This G1311A unit integrates directly into 1100 series stacks, making it a natural fit for labs maintaining or expanding an existing Agilent HPLC installation, and its four-channel proportioning valve allows for efficient solvent screening without reconfiguring plumbing. Sold as pre-owned equipment, this pump is functional and ready for installation, though buyers should plan to replace wear items such as seals and check valves as part of routine preventive maintenance. It offers a reliable, economical path to restoring or upgrading solvent delivery on an Agilent 1100 series HPLC system.