The COULTER STKS is a high volume hematology analyzer designed for laboratories that need walk-away automation. A combination of innovative technologies ensures highly accurate quantitative results, superior separation of cell populations, unprecedented detection of abnormal cell types and 24-hour sample stability. Features of the Coulter STKS include: A directly measured 5-part WBC differential with counts as low as 100 cells/mm.3 Graded RBC morphology and reticulocyte counting. It ensures positive sample identification - the only system that reads the sample bar code and cassette position at the time of aspiration. Sample integrity is also checked by sensors that detect short samples, clots, leaks and other compromised samples and automatically instruct the STKS to suppress an invalid result. Combines the use of three highly accurate measurements to provide superior separation of cell populations. On each sample, over 8,000 white cells or 32,000 red cells are directly analyzed, counted and classified using DC Impedance for volume, RF Opacity for internal composition, and HeNe LASER Scatter for granularity and nuclear structure.