Object Details
- Description
- A wedge colorimeter contains two hollow wedges, one holding the sample and one holding the standard. By moving the wedges up and down, one can vary the depth of solution through which light passes. W. Gallenkamp obtained a German patent (#62560) for the basic form in 1891, and Hans Heele in Berlin made several instruments of this sort. Richards & Co. in New York offered a “Gallenkamp-Heele’s Colorimeter” in 1896, noting that it had a “direct scale of percentage” that permitted very accurate readings, was “especially adapted for sugar factories, dyeing establishments, etc.,” and cost $85.
- The Department of Chemistry at Yale University donated this example to the Smithsonian in 1960. The “D.R.G.M. Hans Heele, Berlin” inscription indicates that it was made before 1923 when Heele’s firm was bought by Bamberg.
- Ref: Hans Heele, Heele-Gallenkamp Kolorimeter (Berlin, n.d.).
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- Hans Heele
- Credit Line
- Yale University Department of Chemistry
- Measurements
- overall: 18 in; 45.72 cm
- overall: 10 7/8 in x 8 in x 7 in; 27.6225 cm x 20.32 cm x 17.78 cm
- Object Name
- Colorimeter
