The Vi-CELL Cell Viability Analyzer provides an automatic means to perform the trypan blue dye exclusion method. Determining cell concentration and viability accurately and precisely is a requirement in research. The Vi-CELL XR automates this process that eliminates variability inherent in manual sample preparation and counting. The Vi-CELL allows users to load up to 10 samples at once for easy and automated cell counting. The cell type function within the Vi-CELL Control Software enables users to optimize the unit for many different cell species, including CHO Cells, yeast cells, white blood cells, and a host of other common cells. The cell type function takes into account cell clumping, cell circularity, cell brightness, cell diameter, and several other pertinent parameters. This capability enables rapid, accurate, and reliable automated cell counting.