A few reactions produce a colour change, for example due to the production of iodine. A colorimeter measures colour change. The rate of reaction can be analysed by plotting a graph of mass or ...

The Range Indicator icon on the display of the colorimeter indicates either the instrument range or the parameter being tested. For many parameters, the instrument can measure in two different ranges.

[Abizar]’s design was inspired by the classic Klett-Summerson colorimeter from the 1950s, which uses a light bulb and color filters to select a wavelength, plus a photoresistor to measure the ...