This Dionex LC Packings Switchos UltiMate HPLC Advanced Microcolumn Switching Device is in great condition and was removed from a working environment. This unit came from a local lab that had surplus lightly used equipment. Please view all photos as they show overall condition, included accessories and functionality. We will be happy to provide additional information as well as photos so please feel free to contact us with any questions. Thermo / LC Packing Switchos II Advanced Microcolumn Switching Unit Features Two Valco 10-Port Low-Dispersion Switching Valves High Precision Loading Pump Four Channel Solvent Selection Valve Automatic or Manual Control of All Valves Description The Thermo / LC Packing Switchos II Advanced Microcolumn Switching Unit is an advanced switching system for use with micro-HPLC systems. A broad range of applications can be performed using micro-column switching with the Switchos II including sample pre-concentration, sample cleanup, multi-dimensional separations (2-D separations), desalting and selective extraction. Typical examples of the use of the unit include immuno-affinity extractions, isolation of phosphorylated peptides from complex protein digests, automated removal of detergents, extraction of drugs from biological fluids, high throughput analysis, etc. Switchos II is confirmed with an LC Packings UltiMate Micropump and is normally used with the LC Packings UltiMate Capillary HPLC System. The system is fully compatible with other instrumentation (a minimum of three contact closures, TTL or Open Collector terminals are required).