The manufacturer of the Varian Prostar HPLC System, Varian is Varian. Refurbished Varian Prostar HPLC complete with Varian Prostar 320 UV-Vis detector, Varian Prostar SD-1A solvent delivery module, Varian Prostar SD1 pump, and Varian Prostar 500 CVM. Sold separately or as part of the Shielded Varian Inova 500.