Directions for Beckman pH meter (Laboratory Model)
- 1938
This page of instructions would have been located inside the lid of the pH meter, so that users would be able to read the instructions upon opening its case.
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 Instruments, Inc. “Directions for Beckman PH Meter (Laboratory Model),” 1938. Beckman Historical Collection, Box 104, Folder 13. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/hh63sw38v.
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