Optical Pyrometer

Optical Pyrometer

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Around the turn of the twentieth century, Heinrich Wanner, of Waldhausen, Germany, unveiled a polarizing pyrometer that compared the luminous intensity of radiation of the same wavelength from two sources. This example of that instrument came from the Department of Chemical Engineering at the University of Michigan. The inscription reads “No. 417,”
Ref: Heinrich Wanner, “Optical Pyrometer,” U.S. Patent 793,970 (July 4, 1905).
Currently not on view
Object Name
pyrometer, optical
box: 7 1/2 in x 13 1/4 in x 7 1/2 in; 19.05 cm x 33.655 cm x 19.05 cm
dial: 3 1/2 in; 8.89 cm
overall in case: 7 3/8 in x 13 1/4 in x 6 7/8 in; 18.7325 cm x 33.655 cm x 17.4625 cm
ID Number
catalog number
accession number
Credit Line
University of Michigan, Department of Chemical Engineering
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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