Water is undoubtedly the most precious natural resource that exists on our planet. Without the seemingly invaluable compound comprised of hydrogen & Oxygen, life on earth would be non-existent. Although we as humans recognize this fact, we disregard it by polluting our rivers, lakes and ocens. Instrumex provides practical solutions for problems like Water Pollution, contamination of water resources by harmful wastes, etc. Chemical Oxygen Demand (COD) is used as a measure of oxygen requirement of a sample that is susceptible to oxidation by strong chemical oxidents