Difference Between Colorimeter and Spectrophotometer The key difference between a colorimeter and a spectrophotometer is that a colorimeter measures absorbance at a single wavelength, while a spectrophotometer provides a full spectrum analysis across multiple wavelengths. FAQs What is a colorimeter used for? A colorimeter is used to measure the concentration of colored compounds in a solution by determining its absorbance at specific wavelengths. What is the principle of colorimeter ? The ... Simplify your testing in the field by using the DR900. Buy Now! Spectrophotometer provide precise color analysis for solid, powder, paste, grain & liquids. CHNSpec is an international brand in the field of colorimetry. Colorimeter refers to a device used in colorimetry that aids in the absorption of a particular wavelength of light by a specific sample solution . Louis J. Duboscq invented it in the year 1870. It is employed to measure how much light transmits and absorbs as it passes through a liquid.