Agilent 1200 Series G1311B Quaternary Pump

This used Agilent 1200 Series G1311B Quaternary Pump is the refined successor to the original G1311A, offering the same four-solvent gradient delivery with improved seal life and flow stability for demanding HPLC applications. It remains a core module of the Agilent 1200 Series platform, capable of forming precise low-pressure gradients for a wide range of separation methods. The unit has been kept in working order and is ready to be installed into an active or newly assembled LC system. Analytical laboratories running pharmaceutical QC, food safety, or contract testing workflows use this pump for its reliable gradient accuracy and its ability to blend up to four mobile phases on demand. It interfaces directly with Agilent autosamplers, thermostatted column compartments, and UV or diode array detectors, and is fully supported by ChemStation and OpenLAB software, allowing straightforward incorporation into existing analytical methods. Sourcing this pump used is an economical way to keep an Agilent-based LC bench running or to add gradient capability to a system currently limited to isocratic work. It suits labs that want the assurance of genuine Agilent hardware without the expense of a new module.