Spectrophotometer-Colorimeter, Bausch & Lomb Spectronic 20
date: label: date made
content: 1962-1981
name: label: maker
content: Bausch & Lomb
notes: label: Description
content: Bausch & Lomb introduced the Spectronic 20 in 1954, describing it as a combination spectrophotometer and colorimeter that was “designed for speedy, simple operation by production-line inspectors and laboratory technicians who need use only two control knobs in making routine colorimetric analyses.” By 1976, the firm was boasting that more than 100,000 of these instruments had been sold.
label: Description
content: This example is a transistorized model of the sort that Bausch & Lomb introduced in 1962. The inscriptions on the front read “Spectronic 20” and “BAUSCH & LOMB.” A metal tag on the back reads “BAUSCH & LOMB / INCORPORATED / ROCHESTER, N.Y. U.S.A. / CAT. NO. 33-29-61-62 / SERIAL NO. / VOLTS 115 / AMPS 3 CYCLES 60 / MADE IN U.S.A.”
label: Description
content: Ref: “Colorimeter-Spectrophotometer Has Wide Applications,” <i>Chemical and Engineering News</i> 32 (Sept. 13, 1954): 3678.
label: Description
content: “Spectronic 20” ad in <i>Analytical Chemistry</i> 27 (June 1955): 14A.
label: Description
content: “World’s first transistor-regulated colorimeter,” ad in <i>Analytical Chemistry</i> 34 (June 1962): 54A-55A.
label: Description
content: “The Search for What and How Much Ends with Spectronic,” ad in <i>Analytical Chemistry</i> 48 (July 1976): 642A-643A.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Rochester
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Chemistry
creditLine: label: Credit Line
content: Transfer from NIH
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1981.0535.02
label: catalog number
content: 1981.0535.02
label: accession number
content: 1981.0535
objectType: label: Object Name
content: Colorimeter - Spectrophotometer
physicalDescription: label: Measurements
content: overall: 20.5 cm x 41.3 cm x 33.7 cm; 8 1/16 in x 16 1/4 in x 13 1/4 in
label: Measurements
content: overall: 8 in x 15 7/8 in x 12 5/8 in; 20.32 cm x 40.3225 cm x 32.0675 cm