A basic scientific tool for chemistry and biology is a colorimeter device used to measure which wavelengths of light a particular sample solution absorbs. Some applications of colorimeters are meas… ...

A colorimeter (in a chemistry context) is an instrument that determines the concentration of a solution by measuring how much light of a certain wavelength is absorbed.

Summerson, "A Simplified Test-Tube Photoelectric Colorimeter, and the Use of the Photoelectric Colorimeter in Colorimetric Analysis," Journal of Biological Chemistry 130 (1939): 149-166. Location ...

It is a low-cost device to detect adulteration, which will be used in pathology, chemistry and life science laboratories. Mumbai: An Indian patent was granted to a device called ‘Low-Cost Drift ...