Flow cytometry is a technology that provides rapid multi-parametric analysis of single cells in solution. Flow cytometers utilize lasers as light sources to produce both scattered and fluorescent light signals that are read by detectors such as photodiodes or photomultiplier tubes. Cell populations can be analyzed andor purified based on their fluorescent or light scattering characteristics.    The cover story of this month titled: “Trust in Your Results — Experience the Benefits of Advanced Flow Cytometry” contributed by Sartorius. As the story suggests Flow cytometry is a powerful tool for analysis of cells and cell-based assays in basic research and for drug discovery and development. The applications of this technology are many and varied, ranging from simple cell counts and viability assays, to complex intracellular staining.