BioTek Inc.'s Eon microplate spectrophotometer combines high performance and high value in microplate-based absorbance readings. Its monochromator-based optics allow flexible, filter-free 200- to 999-nm-wavelength selection in 1-nm increments, and spectral scanning for 6- to 384-well microplates. An optional cuvette port expands functionality to cuvette-based assays and aids in assay miniaturization to microplates or the 2-µl volumes used with the company's Take3 and Take3 Trio microvolume plates. Additional features include 4-Zone temperature control with incubation of up to 65 ºC and walk-away automation when paired with the BioStack microplate stacker or third-party robotics. Linear, orbital and double-orbital shake modes are customizable for easy assay optimization in biofuel research, cell proliferation and cytotoxicity studies. The instrument is powered by Gen5 2.0 data analysis software.