A monochromator-based plate reader puts the user in control of selecting the exact wavelength to measure optical density for an application. Users of the Asys UVM340 can select any wavelength between 340 and 800 nm at 1-nm intervals to measure absorbance. The reader is suitable for ELISA and other absorbance applications, and there is no need to purchase extra filters or change instruments to perform different assays. The Asys UVM340 reader is a single-channel microplate reader that can read 12 to 96 well plates, which provides greater flexibility on plate format than multichannel systems. Front loading allows easy integration into automated systems, and a compact footprint saves valuable bench space. All plate readers are CE marked and manufactured under a rigorous quality system.