Abstract: A system for analyzing a sample of fluid for a plurality of characteristics comprising a cuvette with a plurality of chambers for fluid to be analyzed; a housing assembly having a frame and a support subassembly reciprocable with respect to each other, the support subassembly including a base to receive the cuvette; and processing mechanisms associated with the housing assembly including a first component to intermix the fluid with a diluent and then with reagents in the chambers to facilitate the analysis thereof, the processing mechanisms further including a light source and an associated sensor located in an operative relationship with respect to the cuvette and a computer operatively associated with the sensor to determine a plurality of characteristics of the fluid within the chambers.