The iMark microplate absorbance reader offers fast reading speeds, extensive onboard software capabilities, a preprogrammed validation protocol and a built-in printer in a compact, lightweight unit. The instrument can be used as a stand-alone reader or controlled by a PC or Macintosh with Microplate Manager™ Software. The wavelength range of the iMark reader is 400750 nm, permitting many applications, including enzyme-linked immunosorbent assays (ELISAs) with colorimetric substrates, protein assays (Bradford and Lowry), and DNA quantitation.