TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable TI - Coulter Counter Model S-Plus Jr. Cell Counter ID - gm80hv697 DA - 1980/// YR - 1980 AV - Beckman Historical Collection, Box 58, Folder 96 VL - Beckman Historical Collection, Box 58, Folder 96 AN - Beckman Historical Collection, Box 58, Folder 96 UR - https://digital.sciencehistory.org/works/gm80hv697 AB - Based on the Coulter principle, the Coulter Counter quantifies and sizes particles suspended in a fluid, like blood cells, bacteria, and a wide variety of other substances. The instrument works by drawing liquid containing the particles through a channel, where each particle releases an electrical charge that is measured and counted. The Coulter principle was discovered by Wallace H Coulter in the late 1940s and patented in 1953. The Coulter counter was manufactured by Coulter Corporation until 1997, when the company was acquired by Beckman Instruments and became known as Beckman Coulter, Inc. KW - Medical laboratory technology KW - Scientific apparatus and instruments KW - Blood cell count--Equipment and supplies KW - Flow cytometry LA - ER -