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Photographs

Beckman Expandomatic IV pH Meter

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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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Extent
  • 10 in. W x 8 in. L
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  • Courtesy of Science History Institute

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Series arrangement
  • Series X. Photographic Materials
  • Sub-series 3. Photo Albums
Physical container
  • Box 83

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Cite as

“Beckman Expandomatic IV PH Meter,” n.d. Beckman Historical Collection, Box 83. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/3f4625602.

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