Perfect-Count Microspheres™ is a microbead-based single-platform system for absolute counts, which can be used in combination with monoclonal antibodies conjugated with different fluorochromes.

Its unique internal quality control contains two bead-types (A and B) that assure the accuracy of the cellsubpopulations absolute counts. Type A and B ratio disparity reports possible problems during sample preparation and/or acquisition, which might invalidate final results. A and B bead populations show different fluorescence intensities when excited by a blue laser (488 nm) that help with their identification in the analysis.