Beckman Model 942 pH Monitor
- Circa 1980
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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Related Items
Cite as
Karjalas' Photo Vision. “Beckman Model 942 PH Monitor,” circa 1980. Beckman Historical Collection, Box 79. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/h415p956r.
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