This is a video on the basic principle of colorimetry. I will discuss the idea behind colorimetry, the Sahli's method for determining hemoblobin, the LouviBound comparator as a colorimeter. I will discuss about the construction of the colorimeter and the various parts of it. i will discuss about the semi auto analyser and fully autoanalyser and how they are only colorimeters in their heart. I will then discuss the Laws governing colorimetry
