This instrumnet is designed to read and calculate the results of in-vitro diagnostic assays. Equipped with a large graphical display, the reader provides absorbance and concentration readings at or near the available wavelength. It features multiple, self-prompting operating modes to meet the varying demands and requirements of any facility, and accepts standard 12 mm round tubes as well as 1 cm square cuvettes. Basic calculations are also permanently stored in the Stat Fax memory, including several single and multi-point equations.