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Beckman Model G pH meter in use

  • Circa 1955

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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 “acidimeter” with its glass electrode was renamed the Model G pH meter in 1937 and produced on a larger scale by Beckman’s company, National Technical Laboratories. This instrument kicked off the rapid development not only of NTL and Beckman Instruments, but also of the electronic scientific instrument industry.

Format
Genre
Extent
  • 10 in. W x 10 in. L
Inscription
  • (verso) "PH 82-0096. Beckman Coulter. Model G pH meter. c. 1955."
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 1. Image Files
Physical container
  • Box 55, Folder 74

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Cite as

“Beckman Model G PH Meter in Use,” circa 1955. Beckman Historical Collection, Box 55, Folder 74. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/zg64tk984.

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