The certificate offers congratulations on the acquisition of a Beckman pH meter and gently suggests the purchase of Beckman electrodes to use with the instrument.
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.
|Place of creation|
|Original file type||TIFF|
|View in library catalog|
Beckman Instruments. “Beckman Instruments PH Meter Congratulations Certificate,” 1977. Beckman Historical Collection, Box 112, Folder 121. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/x633f153j.
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