Controls are whole blood quality control products designed to monitor the performance of Beckman Coulter hematology instruments when used in conjunction with Beckman Coulter reagents. Assigned values and expected ranges are provided or they can be used to establish your laboratory's mean. Coulter Cell Controls offer long shelf life and open vial stability. In addition, our Interlaboratory Quality Assurance Program (IQAP) is the largest hematology quality assurance program available at no cost to every customer using Coulter Cell Controls.