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Subject Colorimetry--Instruments Remove constraint Subject: Colorimetry--Instruments

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    • 1940s

    Electric-powered meter with instructions housed in wooden box. Movable components within box: two (2) slide glass filters (1 with red, green, and blue slides; 1 with orange, green, and blue slides); one (1) encasing to…

    • 1944

    General view of technician James Geary using a Klett-Summerson Photoelectric Colorimeter to obtain a determination of iodine at a Dow Chemical Company laboratory. Colorimeters are commonly used to determine trace…

    • 1940s

    A: Cast iron base attached to a sloping cast iron upright supporting the reader, prisms, sample cups, plungers, and a mechanism for raising and lowering the sample cups; two metal knobs control the height of the sample…

  1. A: Duboscq type colorimeter, biological, with electric illuminator. Hollow black cast iron base attached to a sloping cast iron upright supporting the reader, prisms, and sample cups; reader detaches with two metal…

  2. Cast iron base attached to a sloping cast iron upright supporting the reader, prisms, sample cups, and a mechanism for raising and lowering the sample cups on a focusing rail; metal knobs on each side control the height…

    • Undated

    Colorimeters are used to quantify the concentration of a solute in a solution by measuring the absorbance of a particular wavelength or color of light by the solution.

    • Undated

    Colorimeters are used to quantify the concentration of a solute in a solution by measuring the absorbance of a particular wavelength or color of light by the solution.

    • circa 1969

    This instrument was created in 1968 by Beckman Instruments' Advanced Technology Operations (ATO) specifically for measuring the effect of space flight on calcium and creatinine levels in astronauts' urine. Colorimeters…

    • 1950 – 1959

    Wooden box with metal instrument panel on top; four small black rubber feet on bottom; front of wooden box contains printed instructions and folds down to show inside of instrument; rectangular wooden area attached to…

    • 1970

    Colorimeters are used to quantify the concentration of a solute in a solution by measuring the absorbance of a particular wavelength or color of light by the solution.