Beckman pH Meter (Glass Electrode) brochure
- 1935 – 1940
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Small JPG800 x 1103px — 153 KBMedium JPG1200 x 1654px — 343 KBFull-sized JPG2383 x 3285px — 1.6 MBOriginal fileTIFF — 2383 x 3285px — 22.5 MBArnold 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.
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Cite as
Beckman Instruments, Inc. “Beckman PH Meter (Glass Electrode) Brochure,” 1935–1940. Beckman Historical Collection, Box 20, Folder 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/44558f07m.
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Rights
Public DomainDownload all 4 images
PDFZIPof full-sized JPGsDownload selected image
Small JPG800 x 1105px — 225 KBMedium JPG1200 x 1658px — 463 KBFull-sized JPG2391 x 3303px — 1.6 MBOriginal fileTIFF — 2391 x 3303px — 22.7 MB
Rights
Public DomainDownload all 4 images
PDFZIPof full-sized JPGsDownload selected image
Small JPG800 x 1108px — 220 KBMedium JPG1200 x 1662px — 450 KBFull-sized JPG2383 x 3301px — 1.6 MBOriginal fileTIFF — 2383 x 3301px — 22.6 MB
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Public Domain