This glass electrode was first used in Beckman pH meters and later other instruments.
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.
|Creator of work|
Beckman Instruments, Inc. “Instructions for the Beckman Oxygen Electrode Evaluation Kit, X-300-100 (Final),” n.d. Beckman Historical Collection, Box 19, Folder 4. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/kd17ct39j.
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