The significance of monitoring the oxygen consumption of organic matter in water during oxidation and decomposition
Quantifies the total load of reducible organic compounds (including refractory organics) in water
Assesses wastewater treatment efficiency and compliance with industrial discharge standards
Provides early warning of eutrophication risks and supports ecological conservation decisions
Reagent-free operation – UV absorption method eliminates chemical usage.
Multi-parameter measurement – Simultaneously monitors COD, turbidity, and temperature.
Automatic compensation – Corrects for turbidity interference and temperature effects.
Low maintenance – Integrated cleaning brush prevents biofouling; 18-month maintenance cycle.
Robust communication – Supports Modbus RTU and 4–20 mA output for industrial integration.
◀◀ Product Parameters ▶▶
BGT-COD(K2) Online COD Sensor Technical Specifications
Parameter | Specification |
|---|---|
Measurement Principle | Dual-wavelength UV absorption method |
Measurement Range | - COD: 0–200.0 mg/L (Resolution: 0.1 mg/L) |
Accuracy | - COD: ±5% of reading (0–500 mg/L), ±10% (1000–1500 mg/L) |
Response Time (T90) | <30 seconds |
Detection Limit | - 0.2 mg/L (0–200 mg/L range) |
Calibration | Two-point calibration (zero & slope) |
Cleaning Mechanism | Built-in cleaning brush |
Temperature Compensation | Automatic (Pt1000 sensor) |
Output Options | - RS-485 (Modbus RTU protocol) |
Power Supply | 12–24 V DC |
Environmental Conditions | - Operating temperature: 0–45°C |
Material | 316L stainless steel housing |
Installation | Submersible (3/4" NPT thread), IP68 protection |
Dimensions | Refer to dimensional drawing in manual |
◀◀ Application Scenarios ▶▶
A. Wastewater Treatment Plants
Applications:
Real-time monitoring of COD at inlet, aeration tanks, and outlet to optimize aeration and chemical dosing.
Compliance assurance for effluent discharge standards.
Advantages:
Fast response (<30 sec) for process control.
Low maintenance (built-in cleaning brush).
B. Industrial Effluent Monitoring
Target Industries: Pharmaceuticals, chemicals, textiles, food processing (high-organic wastewater).
Key Scenarios:
Discharge outlets: Continuous monitoring for regulatory compliance.
Pretreatment systems: Closed-loop control (e.g., adjusting oxidant dosage based on COD levels).
Note: Verify turbidity range (sensor compensates for ≤1000 NTU interference).
C. Surface Water Monitoring (Rivers/Lakes)
Applications:
Early warning of algal blooms (rising COD may indicate organic pollution).
Trace pollution sources (e.g., illegal discharge investigations).
Installation Tip: Mount on buoys or banks with protective casing to avoid flow impact.
Non-Recommended Scenarios
⚠ Exercise Caution in These Cases:
Oily or dark-colored wastewater: UV absorption may be interfered.
Extreme pH environments: Operation beyond 0–45°C range may reduce lifespan.
High suspended solids without pretreatment: Particles may scratch optical windows despite turbidity compensation.