Chemical Oxygen Demand (COD) is a measurement of the amount of oxygen consumed by reactions in a solution.
The COD Digestion unit from C. Gerhardt has been developed to determine COD according to DIN 38409/German standard method H41. After digestion in the unit COD is determined by titraton until color change of the solution.
Product link: https://www.gerhardt.de/en/product-lines/special-digestions/cod-digestion-unit/