UV water quality sensor DUVCOD-900

BODCODTOC

Product Overview
An advanced IoT-enabled online water quality sensor designed for real-time monitoring of COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), and TOC (Total Organic Carbon) in surface water and wastewater. Boasting an IP68 waterproof rating, it supports Modbus RS485 communication protocol, ensuring reliable performance in harsh industrial and environmental monitoring scenarios. With its reagent-free design and IoT connectivity, the sensor offers efficient, eco-friendly, and remote-accessible water quality analysis for various applications.

Measurement Principle
The DUVCOD-900 operates based on the ultraviolet (UV) absorption principle of organic matter. It utilizes the spectral absorption coefficient SAC254 (at a wavelength of 254 nm) to accurately quantify the concentration of soluble organic compounds in water. Under specific application conditions, the measured SAC254 values can be converted to equivalent COD, BOD, or TOC values. This innovative method enables continuous, real-time monitoring without the need for chemical reagents, eliminating secondary pollution and simplifying operational workflows.

Key Features

• Direct Immersion Measurement: Probe-style design allows direct deployment in water, eliminating the need for complex sampling, pretreatment, or sample delivery systems—ideal for on-site monitoring.
• Reagent-Free & Eco-Friendly: No chemical reagents required, avoiding secondary environmental pollution and reducing long-term operational costs.
• Rapid & Continuous Monitoring: Short response time supports 24/7 real-time data acquisition, capturing dynamic changes in organic load promptly for timely process control.
• Automated Maintenance: Equipped with an automatic cleaning function, minimizing manual maintenance workload and ensuring consistent measurement accuracy over extended periods.
• Robust & Waterproof Design: IP68 protection rating enables reliable operation in wet or submerged environments, suitable for harsh industrial and outdoor monitoring conditions.
• IoT & Communication Compatibility: Supports Modbus RS485 protocol for seamless integration with PLC, SCADA systems, or IoT platforms, enabling remote data access and centralized monitoring.

Applications

• Sewage Treatment Plants: Continuous monitoring of organic load during sewage treatment processes; real-time online monitoring of influent and effluent water quality to ensure compliance with discharge regulations.
• Environmental Monitoring: Continuous on-line monitoring of organic pollutants in surface water (lakes, rivers, reservoirs), industrial effluent (chemical, textile, food & beverage, pharmaceutical industries), and fishery wastewater.
• Water Quality Management: Suitable for monitoring process water in industrial production lines, as well as natural water bodies to assess ecological health and pollution levels.

Specifications
Specifications
Details
Measurement Range
0~1500mg/L BOD (2mm Optical Path)
0~750mg/L BOD (5mm Optical Path)
0~67.5mg/L BOD (50mm Optical Path)
Measurement Accuracy
±5% (KHP standard solution)
Repeatability
±2% (KHP standard solution)
Resolution Ratio
0.01 mg/L
Pressure Range
≤0.4Mpa
Material
Main Body: SUS316L (Ordinary Version), Titanium Alloy (Seawater Version); Cable: PUR
Power Supply
Direct current supply: 9-36V
Communication Protocol
MODBUS RS485
Storage Temperature
-15 ~ 50℃
Operating Temperature
0 ~ 45℃ (not freeze)
Weight
3.2KG
Level of Protection
IP68/NEMA6P
Cable Length
10-meter standard cable which can be extended up to 100 meters.

Technical Characteristics / Specifications

• Model: DUVCOD-900
• Measurement Principle: UV absorption at 254 nm (SAC254)
• Parameters: COD, BOD, TOC
• IP68 waterproof rating
• Supports Modbus RS485 communication
• Reagent-free operation
• Automatic cleaning function
• Material: SUS316L or Titanium Alloy (depending on version)
• Power supply: 9-36V DC
• Operating temperature: 0 ~ 45℃ (not freeze)
• Storage temperature: -15 ~ 50℃
• Weight: 3.2KG
• Cable: 10m standard, extendable to 100m