BD FACScan flow cytometry analyser, used to sort cells by labelling them with up to three different fluorescent dyes detected by a single laser, made by Becton Dickinson and Company, New Jersey, United States, 1991. During the 1990s the FACScan was the industry-standard commercial cell analyser in research and clinical settings. This machine was used at MRC Mill Hill Laboratory within immunology, virology, and parasitology research and by yeast geneticists. BD FACScan flow cytometry analyser 1991