The Buck Scientific BLC-20P Variable wavelength gradient HPLC systems completely integrated design provides full functionality in a small footprint suitable for many types of analysis. Electronic controls for pump and detectors allow fully automated operation for reproducible methods with Buck-Chrom gradient controller. Output to an optional Peaksimple data station for QC testing and R&D requirements or optional analog recorder. Fully configured systems include reverse-phase C-18 column, solvent delivery system, syringe, and detector. Variable wavelength systems give high-resolution selectivity(5nm) from 190-360 nm (D2) and 360-800 nm (Tungsten). Wide selection of reverse-phase (C-18, C-8, Amino, Cyano, Phenyl), normal (SiO2, Al2O3), and GPC columns available. Completely bio-compatible contact surfaces in "All-Polymer" design (PEEK, Teflon, Ruby, Sapphire and Quartz) eliminates any ionic contamination with stainless steel option for high-pressure and GPC/SEC work. mPrecision electronic Pump Control from 0.01-9.99 ml/min (Analytical) and 0.10-40.0 ml/min (Semi-Preparative). Detector flowcells quickly changed from Analytical (7 mm pathlength/10 ml) to Preparative (2 mm pathlength/4/ml). Suitable for any HPLC application from cosmetics, foods, pharmaceuticals and education; to paints, pigments, polymers, petrochemicals and botanicals.