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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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