FIRST -- Commercially Successful Electronic pH Meter - Pasadena, CA
Posted by: 
bluesnote
N 34° 08.351 W 118° 07.591
11S E 396135 N 3778162
A historical marker on the Caltech campus.
Waymark Code: WM13TX6
Location: California, United States
Date Posted: 02/19/2021
Views: 0
The plaque says, "Arnold O. Beckman developed the first commercially successful electronic pH meter while a member of the faculty of the California Institute of Technology. This rugged and portable “acidimeter,” which had all necessary components housed in a single unit, allowed scientists to measure acidity accurately and rapidly. It immediately met an important need of the California citrus industry: how to measure the pH of lemon juice. The innovative features of the pH meter, including an early use of integrated electronic technology, were the basis for subsequent modern instrumentation developed by Beckman and Beckman Instruments."
FIRST - Classification Variable: Item or Event
Date of FIRST: Not listed
More Information - Web URL: Not listed
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