Brief introduction

Chemical Oxygen Demand (COD) is a chemical method used to measure the amount of reducible substances that need to be oxidized in a water sample. Under certain conditions, the amount of oxidant consumed to oxidize reducing substances in 1 liter of water sample is used as an indicator to convert it into milligrams of oxygen required per liter of water sample after oxidation, expressed in mg/L. It reflects the degree of pollution caused by reducing substances in water. This indicator is also one of the comprehensive indicators of the relative content of organic matter.
CODcr online monitoring instrument is applied for online monitoring of industrial pollution source wastewater, industrial process water, and municipal sewage treatment plant inlet and outlet water quality. The instrument is suitable for wastewater with a chemical oxygen demand ranging from 10 to 4000 mg/L and a chloride concentration below 2.5 g/L Cl ¯. According to user requirements, it can be applied to wastewater with a chloride concentration below 20 g/L Cl ¯.

IIPerformance characteristics

1. Adopting MasterFlex peristaltic pump technology from the United States, with constant rotational speed, stable and accurate injection; Equipped with ultra wear-resistant peristaltic pump tubing, with a long service life;

2. Adopting German imported constant temperature modules to ensure the working environment of the electrodes is not affected by external factors;

3. Dual filtration setting, suitable for water with high suspended solids, impurities, and floating objects. The precision pretreatment system has self-cleaning, backwashing, and precision filtration functions, ensuring good representativeness of the sample while avoiding blockage of the pipeline by large suspended particles, and can be separated from the upper host;

4. Adopting Germany's nine way valve sampling system, it has strong corrosion resistance, long service life, and effectively avoids the compression aging of traditional pipelines;

5. Adopting a European power system specific power supply system, anti electromagnetic interference, unstable power grid, and greatly reducing after-sales costs;

5. All pipelines are made of imported 3-fluorine and 4-fluoro materials that are resistant to high temperatures and corrosion, with an inner diameter of 1.5 millimeters and no leakage;

6. Can store 20000 measurement data, automatically overwrite the earliest data when full, and data will not be lost in case of power failure;

7. When powered off, the instrument automatically stops working and stands by, and automatically resets when powered on;

8. Regularly clean the pipeline (adjustable time), clean the pipeline after each sample (adjustable switch), saving time and effort:

9. Equipped with an original imported 7-inch TFT 70000 color true color touch screen, with three interface operating languages in Chinese, English, and Chinese, which can be interchanged at any time, and can be upgraded to Uyghur, Tibetan, and other languages;

10. Optional high-quality micro industrial printer (with adjustable switch);

11. Timed sample making (adjustable time), supports remote start of sample making, ensures networking:

12. Equipped with RS232 interface (convertible to RS485 interface, communication protocol publicly available), meeting the requirements of digital networking;

13. Equipped with 4-20mA analog output (adjustable range for 20mA), it can be easily connected to the internet.

IIITechnical Parameter