pH Meter
pH Meter
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- Description
- A pH meter measures the acidity of aqueous solutions. When asked about an instrument suitable for testing citrus fruit, Arnold Beckman, a young chemist at the California Institute of Technology, designed pH meter with glass electrodes, and showed a prototype at the American Chemical Society meeting in 1935. This example dates from the 1960s. One inscription reads “CORNING / SCIENTIFIC INSTRUMENTS” and “pH METER / MODEL 10.” Another reads “Catalog No. / 475010 / Serial No. 125004.”
- Ref: Ad in Analytical Chemistry 39 (March 1967): 101A.
- Location
- Currently not on view
- Object Name
- Ph Meter
- maker
- Corning Scientific Instruments
- Associated Place
- United States: New York, New York City
- Physical Description
- metal (overall material)
- glass (overall material)
- Measurements
- overall: 38.1 cm x 15.2 cm x 22.9 cm; 15 in x 6 in x 9 in
- overall: 9 in x 15 in x 6 1/2 in; 22.86 cm x 38.1 cm x 16.51 cm
- ID Number
- 1991.0892.05
- catalog number
- 1991.0892.05
- accession number
- 1991.0892
- Credit Line
- Gift of Worcester Foundation for Experimental Biology, Inc. (through Thoru Pederson)
- See more items in
- Medicine and Science: Chemistry
- Data Source
- National Museum of American History
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