Product Introduction

YX-CODcr-Ⅱ Online Automatic Analyzer is applied to water quality monitoring of wastewater with COD (chemical oxygen demand) between (0~5000)mg/L and a concentration of chloride ions less than 5g/L. Its unique design endows the analyzer with features such as a low failure rate, low maintenance demand, small consumption of reagents, as well as great cost performance. The analyzer is widely applied to sewage emission monitoring and controlling in chemical, metallurgy, papermaking, pharmaceutical and food industries, and water quality monitoring of sewage treatment plants, surface water, etc.

Working Principle

The water sample is digested by the mixture of potassium dichromate and sulfuric acid at a high temperature (175℃), during which organic reducing substances in the water sample are oxidized. In the reaction, Cr6+ is reduced into Cr3+, which causes a color change in the mixture. It calculates the consumption of potassium dichromate by observing the changes of the colors and finally converts the sample into the required oxygen content during the redox reaction, i.e., COD (chemical oxygen demand) of the tested water sample.

Product Features

Fast analyzing speed, high sensitivity, stable operation, little maintenance work and little operation cost;

Visual optical system to achieve precise quantification of tiny reagent;

Negative pressure inhalation of the peristaltic pump to protect the pump pipe from being corroded;

Enclosed digestion system to overcome the effect of corrosive gases;

Application of the shielding liquid to eliminate interference from chloride ions during absorbance;

Multiple password protection to prevent misuse and improper modification of parameters;

Automatic protection from power failure and water-break;

Remote transmission control and bidirectional communications;

Automatic cleaning after each measurement;

Random setting between 20~9999 min, or setting of sampling and measurement hourly, and remote setting;

Automatic fault diagnosis and remote fault reset;

With Large data storage capacity, it could store for more than 2,000 groups of historical records.