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Beckman Digital pH Meter
Beckman Instructions 81804
- 1969-Jun
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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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Beckman Instruments, Inc. “Beckman Digital PH Meter,” June 1969. Beckman Historical Collection, Box 111, Folder 54. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/vt150j93m.
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Rights
Public Domain