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Digital Collections

Photographs

Beckman Model 900 pH Analyzer (Interior)

  • Circa 1969

Rights

Unknown Rightsholder

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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
  • 5 in. W x 3.5 in. L
Inscription
  • (verso) "900P. By Head on of 900."
  • (front right) "AH0586-21. Model 900 (Interior)."
  • (verso) "Armstrong + Hess. 2220 East Howell Avenue, Anaheim, California 92805. Norman Armstrong - W. J. Hess. Professional Photography. 0586-21. Bus. Phone (714) 532-4424. Res. Phone: (714) 772-3427."
Subject
Rights In Copyright - Rights-holder(s) Unlocatable or Unidentifiable
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 84

View in library catalog

Related Items

Cite as

Armstrong & Hess. “Beckman Model 900 PH Analyzer (Interior),” circa 1969. Beckman Historical Collection, Box 84. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/9s161641g.

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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.