xMark Absorbance Microplate Reader and the Bio-Rad xMark Absorbance Microplate Spectrophotometer as well as the Microplate Manager 6 ( MPM6) software to operate the readers and analyze data. With iMark Absorbance Microplate Reader, users can read any commercial or specially made colorimetric assay in 96-well format. Six pre-installed filters cover common colorimetric applications, producing data that may be documented on system’ s built-in printer. Combining 200-1, 000 nm spectral range with 6-1, 536-well format, xMark Absorbance Microplate Spectrophotometer can detect absorbance in hundreds of points within single well for extra control over sample and assay behavior.