Beckman Model 943 pH Controller
- Undated
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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Cite as
Karjalas' Photo Vision. “Beckman Model 943 PH Controller,” n.d. Beckman Historical Collection, Box 79. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/0v838066f.
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