About Magazine Podcasts Events
Museum Hours:Wednesday–Saturday, 10AM–5PM

Digital Collections

Photographs

Beckman Model H-5 pH Meter

  • Undated

Rights

Unknown Rightsholder

Download selected image

PDFSmall JPG1200 x 979px — 109 KBFull-sized JPG1626 x 1326px — 173 KBOriginal fileTIFF — 1626 x 1326px — 6.2 MB
View
Unknown
Rightsholder
PDF
Download PDF

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 3.75 in. L
Inscription
  • (front right) "Hesketh 11194-2. Model H-5 pH Meter."
  • (verso) "Dean Hesketh Company, Inc. Professional Photo. 714-772-2554. 11194-2."
  • (verso) "11194-2"
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

View collection guide View in library catalog

Related Items

Cite as

Hesketh, Dean D. “Beckman Model H-5 PH Meter,” n.d. Beckman Historical Collection, Box 86. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/t722h928x.

  Export citation (RIS) ?

This citation is automatically generated and may contain errors.

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.