Beckman Model R pH meter
- 1942 – 1959
The Model R Industrial pH Meter was first produced in 1942, although this photograph was likely taken much later.
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
“Beckman Model R PH Meter,” 1942–1959. Beckman Historical Collection, Box 77. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/jq085j99x.
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