Chemical oxygen demand (COD) refers to the mass concentration of oxidant consumed in the oxidation of organic substances and inorganic reducing substances in water sample with strong oxidant under certain conditions. COD reflects the degree of water polluted by organic substances and inorganic reducing substances.

It has the functions of controlling the water sample collection automatically, digestion and oxidation, reaction measurement, data processing and data transmission, which can finish the whole process of COD analysis of wastewater fast, continuously and automatically.

It is designed according to oxidation principle of potassium dichromate. Add a known potassium dichromate solution into the sample, the strong sulfuric acid as the medium, the silver sulfate as the catalyst, and after high temperature digestion, the chemical oxygen demand (COD) can be colorimetrically determined by spectrophotometric method. 

       ◆7” LCD touch screen, displayed in Chinese or English, is easy to operate, the interface is beautiful and generous, the display content is rich and intuitive.

       ◆Integrated digestion and measurement -- More accurate and faster measurement results.        

◆Imported monochromatic light source – Excellent performance, concentrated energy, and low power consumption.    

◆High precision injection pump – High measurement accuracy, low reagent consumption.    

◆Acid-resistant and alkali-resistant, high temperature resistant valves -- Long service life and less manual maintenance.    

◆Equipped with pretreatment device, which can meet the measurement requirements of different water quality.    

◆Auto-calibration function -- ensures more accurate measurement.   

◆With intelligent maintenance function -- It can clean automatically after each detection, which ensures more accurate measurement each time and reduces the manual maintenance.