Quaternary HPLC Specs: Four-element infusion pump with series double plungers and double ball check valves for automated 4-channel online gradient mixing. Degasser: 4-channel vacuum unit, upgradeable to 5 channels for autosampler needle washing. VWD Detector: 190-900nm with dual D2/W lamps, automated switching, DSP control, and built-in Holmium Oxide auto-calibration. Design features thermal insulation and tool-free, pre-aligned side lamp replacement. Metrics: Noise ?±0.25x10^-5 AU, Drift ?0.4x10^-4 AU/h, 1nm precision, ±0.1nm accuracy, 10µL cell (10mm path), with optional 5µL semi-prep cell. Fluidics: 1/16" SS or PEEK tubing. Connectivity: LAN-based integration with autosamplers, fraction collectors, fluorescence, RI, and MS detectors. Environment: 15-35°C, <85% RH, 220V, 50Hz/60Hz.