File:Klett Bio Colorimeter - DPLA - c9bdeb0a09f9fbbb82a725a2de78ff0a (page 2).jpg
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[edit]Klett Bio Colorimeter ( ) | |||||||||||||||||||||
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Creator InfoField | Klett Manufacturing Company | ||||||||||||||||||||
Title |
Klett Bio Colorimeter |
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Description |
Klett Bio Colorimeter, a device used in colorimetry to measure the absorbance of particular wavelengths of light by a specific solution. Colorimeters are commonly used to determine the concentration of a known solute in a given solution by the application of the Beer-Lambert law, which states that the concentration of a solute is proportional to the absorbance. Klett Bio Colorimeters were specifically designed for clinical laboratory work. For example, they can be used to determine the concentration of hemoglobin, or other substances, in blood. This Klett colorimeter includes standard color disks made of glass, which can be used in place of standard solutions in color comparisons. The color disks are inserted into glass "plungers," similar to the glass sample cups, and viewed alongside the samples. The colorimeter's black metal base is attached to an upright made of hollow bronze and finished with black enamel which supports the microscope reader. Two stainless steel knobs on the upright control the height of the sample stand. The base supports a sliding metal and glass daylight filter and a blue glass color filter. The hollow base contains a light bulb and a hemoglobin results table, printed on linen, is built into the bottom front of the base and can be scrolled through with a black plastic knob. Robert E. Klett, the inventor of this model, was a native of Berlin who immigrated to the U.S. in 1905. Klett established the Klett Manufacturing Co. in 1916. The company specialized in Duboscq-type colorimeters that, because of the war in Europe, were no longer available in the United States. |
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Date |
1929 date QS:P571,+1929-00-00T00:00:00Z/9 |
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Collection |
institution QS:P195,Q5090408 |
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Source/Photographer |
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Permission (Reusing this file) |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:54, 6 January 2023 | 3,453 × 2,156 (255 KB) | DPLA bot (talk | contribs) | Uploading DPLA ID dpla:c9bdeb0a09f9fbbb82a725a2de78ff0a |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Date and time of data generation | 11:27, 11 January 2022 |
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Orientation | Normal |
Horizontal resolution | 400 dpi |
Vertical resolution | 400 dpi |
Y and C positioning | Centered |
Exif version | 2.1 |
Meaning of each component |
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Supported Flashpix version | 1 |
Color space | Uncalibrated |
Serial number of camera | FP040179 |
Lens used | Schneider Kreuznach LS 55mm f/2.8 |
Date and time of digitizing | 11:27, 11 January 2022 |
Software used | Capture One 21 Macintosh |
File change date and time | 09:45, 11 January 2022 |
Date metadata was last modified | 09:45, 11 January 2022 |
Unique ID of original document | xmp.did:7036746f-969e-4c79-bbdb-ceb4a368a44a |