High efficiency 100 uL mixer using micro reactor technology to thoroughly blend solvents in a small volume. This mixer is recommended for (U)HPLC systems with an optical detector using solvents such as acetonitrile and methanol at low wavelengths (<220 nm) and with additives like formic acid. Effective at mixing solvents at analytical flow rates (1-2 mL/min) and LCMS flow rates with solvents from pH 1-14. This mixer comes with a Mixer Recognition Device which will log the volume of the mixer in the system configuration when used with the CTO-40S/C oven and LabSolutions.