The Waters Alliance e2695 HPLC system comes with a Waters 2489 UV/Vis detector. Specifications:. Solvent management:. Number of solvents:. One to four. Solvent conditioning:. Vacuum degassing, two operating modes, four chambers, 500 µL internal volume per chamber. Flow rate spectrum:. 0.000 to 10.000 mL/min (typically 0.050 to 5.000 mL/min) in 0.001 mL/min increments. Compressibility compensation:. Automatically uninterrupted. System delay volume:. < 650 µL, independent of back pressure at 1 mL/min. Plunger seal flushing:. Integrated, active, programmable. Gradient profiles:. 11 gradient curves (including linear, stepwise [2], concave [4] and convex [4]). Dry prefill/wet prefill:. Automatic control via front panel, SystemPREP function for automatic solvent cleaning. Flow ramp:. Time (0.01 to 30.00 min in 0.01 min increments) to reach maximum flow rate. Maximum operating pressure:. 5000 psi (345 bar) (0.010 to 3,000 mL/min), programmable upper and lower limits. Composition range:. 0.0% to 100.0%, in 0.1% increments. Composition accuracy:. +0.5% absolute, independent of back pressure (tests with proportioning valve pair, [degassed methanol: methanol/propylparaben, 2.0 mL/min, 254nm]). Composition precision:.