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.
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|View in library catalog|
Beckman Instruments. “Electrode Case Beckman PH Meter Diagram,” October 11, 1935. Beckman Historical Collection, Box 19, Folder 27. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/8k71nh74g.
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