Beckman Expandomatic SS-2 pH Meter
- Circa 1968
The Expandomatic SS-2 was designed for the detection of very small changes in pH and use in potentiometric and polarization titrations.
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 Expandomatic SS-2 PH Meter,” circa 1968. Beckman Historical Collection, Box 83. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/3197xm20x.
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