Blood Journal
Leading the way in experimental and clinical research in hematology

An Electronic Blood-Cell-Counting Machine

  2. J. W. STEWART, and
  3. G. HAGGIS
  1. Bland-Sutton Institute of Pathology and The Barnato Joel Laboratories, The Middlesex Hospital, London, England.


An electronic blood cell counting machine operating on a flow principle is described. It is quick and easy to use; it can perform a red cell count in ten seconds with an accuracy of ± 2.1 per cent (that is, 5000 cells counted in 10 seconds for a 5 M count). Leukocyte counts can also be performed in ten seconds with an accuracy of ± 9 per cent for a single count (500 cells counted in a 5000 count).