Installation of online COD automatic monitoring instrument at sewage discharge outlet

Installation of online COD automatic monitoring instrument at sewage discharge outlet

Model: AME-3000

Method basis: National standard GB11914-89 "Water Quality - Determination of Chemical Oxygen Demand - Potassium Dichromate", measurement range: 5-1500mg/L, 220V power supply, 4-20mA+485. Dimensions: Height 800 * Width 389 * Depth 306mm, equipped with a set of reagents and a self-priming pump, as well as an installation base

Detection principle

Add a known amount of potassium dichromate solution to the water sample, and use silver salt as a catalyst in a strong acid mediumMercury acid is used as a masking agent, and after high-temperature and high-pressure digestion reaction, the absorbance of the product is detected at a specific wavelength according to Langmuir spectroscopyThe Beer's Law states that there is a linear correlation between the chemical oxygen demand (COD) content in water and its absorbance, which can be used to determine the water qualityChemical oxygen demand concentration.Note: There are difficult to oxidize substances such as aromatic hydrocarbons and pyridine in the water sample, and the digestion time can be appropriately extended

Characteristics

The monitor is compact in size and easy to maintain on a daily basis;lThe monitor adopts high-precision photoelectric measurement and detection technology, which is suitable for various complex water bodies;lEquipped with three ranges (0-100mg/L), (0-200mg/L), and (0-1000mg/L), it meets the requirements of on-site testingMost water quality monitoring requirements. The range can also be expanded according to the actual situation on site;lEquipped with measurement modes such as fixed-point, periodic, and maintenance, meeting the requirements for monitoring frequency on site;lThe consumption of reagents is extremely low, greatly reducing operation and maintenance costs;lMultiple communication methods such as 4-20mA, RS232/RS485, etc., meet the communication requirements of the monitoring instrument on site;

Installation of online COD automatic monitoring instrument at sewage discharge outlet

Chemical Oxygen Demand Analyzer

COD online monitoring instrument

COD analyzer