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Location:Home > Products > Product series> Pollution Source Monitoring > Pollution Source Water Quality Monitoring > Online Monitor for Water Quality's Chemical Oxygen Demand

Online Monitor for Water Quality's Chemical Oxygen Demand

  • Description:It utilizes the principle of potassium dichromate high-temperature digestion and spectrophotometry. After undergoing pretreatment, the water sample is oxidized by potassium dichromate under high temperature and high pressure conditions. The Chemical Oxygen Demand (COD) content is then quickly determined using a spectrophotometer. The principle of the instrument complies with standards such as the "Water quality - Determination of the chemical oxygen demand - Dichromate method" (HJ 828-2017) and the "Water quality-Determination of the chemical oxygen demand-Fast digestion-Spectrophotometric method" (HJ/T 399-2007). This instrument meets the requirements of the "Technical specifications and test procedures for water quality on-line automatic monitoring equipment of chemical oxygen demand (CODCr)" (HJ 377-2019).

● The instrument is small in size, easy to transport, and flexible to install, allowing one person to complete the installation

● The instrument can be used in a wide range of applications, including laboratories and mobile monitoring vehicles

● The instrument is modularized, with high maintenance efficiency, and maintenance can be completed with a screwdriver

● Low reagent consumption, reagent level monitoring and early warning, overall reagent replacement, prompt customer notification for easy reagent replacement

● Using a specific combination method, it has strong ability to mask chloride ions and can mask 10,000 mg/L chloride ions

● Remote operation and remote online software upgrades allow for quick updates to customer needs and reduced maintenance

● Detailed records of the time and number of times the instrument door is opened, which can be used in conjunction with video to prevent data falsification and tampering

● The entire piping system is made of corrosion-resistant materials, which reduces the failure rate, maintenance requirements and extends the service life

● Multiple measurement modes, flexible addition of trigger measurements according to external drainage, convenient monitoring of enterprise gap drainage


● Surface water (IV, V) online monitoring, such as urban rivers, pollution sources entering estuaries, river estuaries, etc.

● Online monitoring of sewage treatment processes, such as electroplating wastewater treatment processes

● Industrial wastewater online monitoring, such as electroplating, circuit boards, hospitals, food, paper, printing and dyeing, coal mines, metal smelting, aquaculture and animal husbandry industries

● Domestic sewage online monitoring, such as the import and discharge of sewage treatment plants



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