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Beckman Model G pH meter with external electrode assembly

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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.

Photographer
Format
Genre
Extent
  • 4 in. W x 5 in. L
Inscription
  • (bottom front) "Photographers 3. 635-2. Model G (with External Electrode Assembly)."
  • (verso) "Photographers 3. Chow-Goetze-Ono. 206 N. Los Angeles St. Orange, California."
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 86

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Related Items

Cite as

Photographers III. “Beckman Model G PH Meter with External Electrode Assembly,” n.d. Beckman Historical Collection, Box 86. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/05741s112.

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