Suzhou Delfino Environmental Technology Co., Ltd.
Create value for customers!
Add to Cart
Chemical Oxygen Demand Probe UV254nm COD Sensor With RS485 Modbus RTU
The COD probe of Daruifuno adopts Spectral Absorption Coefficient (SAC) method, which can measure the absorption of light at a specific wavelength. The sensor doesn't need consumables during the measurement process. The COD electrode can measure COD, TOC, turbidity, temperature and other parameters. It uses two light sources, 254nm and 365nm UV reference light.
Measuring Principle Of The COD Probe
Many organic substances dissolved in water absorb ultraviolet rays, and the electromagnetic spectrum ranges from 200 to 390 nm. The simplest form of measurement using this principle is the Spectral Absorption Coefficient (SAC), which can measure the absorption of light at a specific wavelength. Traditionally, a wavelength of 254nm is used because it is located in an area sensitive to organic absorption.
Therefore, by measuring the degree of absorption of ultraviolet light with a wavelength of 254 nm by organic substances, the substitution of organic substances in water can be detected.
The chemical oxygen demand(COD) sensor can be used in a wide range of applications.
Advantages Of The COD Probe
Applications Of The COD Probe
Technical Parameters
| Product Name | COD probe |
| Product Model | CODuv351 |
| Measuring Principle | UV254 ultraviolet absorption method |
| Measuring Range(COD) | 0.75~370mg/L |
| Resolution(COD) | 0.01mg/L |
| Accuracy(COD) | ±2% or ±2.5mg/L, take the larger one |
| Measuring Range(TOC) | 0.3 ~150mg/L |
| Accuracy(TOC) | ±2% or ±2.5mg/L, take the larger one |
| Resolution(TOC) | 0.1mg/L |
| Measuring Range(TU) | 0-300 NTU |
| Accuracy(TU) | 3% or 0.2NTU, take the larger one |
| Resolution(TU) | 0.1NTU |
| Operating Temperature | +5 ~ 45℃ |
| Calibration | 2-point calibration |
| Protection Grade | IP68 |
| Working Pressure | 1Bar |
| Response Time | T90 max. 10s |
| Flow Rate | < 3 m/s |
| Cleaning Method | Rubber scraper |
| Power | 12V 15mA (normal), 200mA (maximum, when cleaning) |
| Output | RS485, Modbus RTU protocol |
| Dimension | Diameter 50mm, length 215mm |
| Cable Length | 10m(custom) |
| Shell Material | POM and 316L |
The Matched COD Controller Parameter
| Product Name | COD analyzer |
| Product Model | DUC2-COD-H |
| Software Version | DRFN COD analysis software V1.0 |
| Display Range | 0-1000 mg/L |
| Resolution | 0.01 mg/L |
| Relay Control | 2 settable SPST relays max. load 3A/250VAC |
| Analog Current Output | 2 settable 0/4~20mA active current loop output max. load 1000Ω |
| Communication Method | Two-wire RS485 interface; MODBUS RTU; support JSON text data format |
| Display Screen | 128*64 LCD |
| Time History/Data Record | Year/month/day/hour/min/second, record 14000 historical data |
| Protection Level | IP66 |
| Operating Environment | 0～60℃, relative humidity less than 95% (no condensation) |
| Storage Environment | -20～70℃, relative humidity less than 55% (no condensation) |
| Shell Material | Enhanced ABS |
| Size | 144*144*120mm (hole size 138*138 mm) |
| Mounting Method | Wall mounting, pipe clamping, panel mounting |
| Power Supply | 18 ~ 36V DC or 100~240V AC |
| Weight | 800g |
| Power Consumption | 12W |