Development of Low Cost and Portable Colorimeter Using TCS 3200 Color Sensor

The analysis of the chemical solutions for various applications is an essential part of the industries, mainly in production sectors, to know the solution's quantity and quality. Its absorption value gives the solution's quality, and its percentage concentration gives the quantity of the solution. The appropriate solution will give desired results which will help to user achieving set goals. For analyzing chemical and color solutions, a low cost, portable, lightweight colorimeter is designed, giving information about solutions absorbance and concentration. The colorimeter consists of the TCS 3200 color sensor, which has 64 photodiodes as detectors and four LEDs as light source, and an Arduino Uno board for processing output from the color sensor in the plastic box. In the colorimeter, the light source and detector are placed in opposite directions usually, but in this designed colorimeter, they both are at the same place, and due to that, the cost for a separate detector and its space is reduced. Further, some solutions absorbance and concentration are checked, and it is compared with Cool Spectrophotometer 100 of BSR technologies and found an error of less than 6 percent for all solutions.