Digital Automatic Cleaning COD Probe Wastewater Test

Overview

The COD351 series online COD Sensor independently developed and produced by Delfino can not only measure the COD value of water quality in real time, but also measure the TOC and turbidity value of water quality at the same time. Used with our DUC2-COD Controller, the BOD value of the water quality can also be displayed. This COD sensor is based on the principle of UV absorption, has a small size, and has an integrated cleaning brush for easy installation and high reliability.?

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Measurement Principle

Many organic substances dissolved in water have an absorption effect on ultraviolet light. Therefore, by measuring the absorption of ultraviolet light at a wavelength of 254 nm by these organic substances, the total amount of organic pollutants in the water can be measured. This online COD sensor adopts two light sources, one 254nm ultraviolet light, and one way turbidity compensation, which automatically eliminates the interference of suspended solids value in water, making the measurement more stable and reliable.

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Specification

Model	COD351
Measuring Principle	UV254 ultraviolet absorption method
Measuring Range(COD)	COD351L: 0.75~500mg/L COD351H: 1~1500mg/L
Resolution(COD)	0.01mg/L
Accuracy(COD)	±3% or 0.5mg/L
Measuring Range(TOC)	COD351L: 0.3~200mg/L COD351H: 0.4~600mg/L
Resolution(TOC)	0.01mg/L
Measuring Range(TU)	COD351L: 0~300NTU COD351H: 0~1000NTU
Operating Temperature	0~ 45℃
Protection Grade	IP68
Working Pressure	1Bar
Cleaning Method	Rubber scraper
Power	12~24V DC
Output	RS485, Modbus RTU protocol
Dimension	Diameter 60mm, length 215mm
Cable Length	10m(custom)
Shell Material	POM and 316L

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The importance of measuring the wastewater COD value

1. Understand the degree of organic pollution in wastewater: the higher the COD value, the higher the organic matter content in the wastewater and the more serious the degree of pollution.
2. Determine wastewater treatment process: COD value can help determine suitable wastewater treatment process, such as biological, chemical or physical treatment.
3. Monitor the effect of wastewater treatment: monitoring the COD value can understand the effect of wastewater treatment, timely find the problems in the treatment process, adjust the treatment process, and improve the efficiency of wastewater treatment.
4. Protect the environment: If wastewater with high COD value is discharged into natural water bodies, it will lead to eutrophication of water bodies and damage to the ecological environment. Therefore, monitoring COD values can protect the environment and reduce the impact on the ecological environment.