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 - Institute of Biology Report on pH Meter Questionnaire ID - 5712m734d AU - Institute of Biology DA - 1955/// YR - 1955 AV - Beckman Historical Collection, Box 19, Folder 15 VL - Beckman Historical Collection, Box 19, Folder 15 AN - Beckman Historical Collection, Box 19, Folder 15 UR - https://digital.sciencehistory.org/works/5712m734d AB - The questionnaire results identified pH meter features that would broadly appeal to biologists. Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off rapid development not only of Beckman Instruments, Inc. but also of the electronic scientific instrument industry. KW - Hydrogen-ion concentration--Measurement--Instruments KW - Scientific apparatus and instruments KW - Biological laboratories--Equipment and supplies LA - English ER -