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Digital Collections

Photographs

Beckman Zeromatic II pH meter, with two workers at benches in the background

  • Circa 1966

Rights

Public Domain

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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.

Property Value
Photographer
Format
Genre
Extent
  • 8 in. W x 10 in. L
Inscription
  • (verso) "Armstrong. 2016 N. State College Blvd. Orange, Calif. Ph. 532-4424, 772-3427."
  • (verso) "pH #2. 32%"
  • (verso) "0087 4"
  • (verso) "PP05-36"
Subject
Rights Public Domain Mark 1.0
Credit line
  • Courtesy of Science History Institute

Institutional location

Department
Collection
Series arrangement
  • Series X. Photographic Materials
  • Sub-series 3. Photo Albums
Physical container
  • Box 81

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Related Items

Cite as

Armstrong & Hess. “Beckman Zeromatic II PH Meter, with Two Workers at Benches in the Background,” circa 1966. Beckman Historical Collection, Box 81. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/tb09j5775.

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The Science History Institute recognizes there are materials in our collections that may be offensive or harmful, containing racist, sexist, Eurocentric, ableist, or homophobic language or depictions. The history of science is not exempt from beliefs or practices harmful to traditionally marginalized groups. The Institute is engaged in ongoing efforts to responsibly present and address the evidence of oppression and injustice inextricable from the history of science. If you would like to learn more about our ongoing efforts or if you encounter harmful, inaccurate, or insufficient descriptions, please contact us at digital@sciencehistory.org.