COD / BOD
UVC Integrated Online COD Sensor
COD / Organics (UV254)
Reagent-free UV254 absorption COD sensor delivering results within 1 second, with dual-beam turbidity compensation.
- No reagents, no sample pre-treatment
- Measurement within 1 second
- Dual-beam compensation for color and turbidity
Overview
An online COD analyzer is an instrument that continuously measures chemical oxygen demand in water, helping operators monitor organic pollution levels without laboratory testing.
Organic compounds containing conjugated double bonds or polycyclic aromatic hydrocarbons absorb ultraviolet light when dissolved in water. By measuring absorbance at 254 nm (SAC254), the sensor quantifies total organic pollution. An infrared reference beam compensates for turbidity interference.
Typical Applications
COD/BOD monitoring at inlets, biological tanks, sedimentation tanks and denitrification filters of wastewater treatment plantsCOD/BOD monitoring in rivers, lakes, seawater and aquaculture environmentsIndustrial wastewater discharge controlProcess water organic load tracking
Features
- Internationally recognized UV absorption method with high measurement accuracy
- Dual-beam optical design minimizes interference from color and turbidity
- No sample pre-treatment required; measurement completes within 1 second
- Advanced light source with long service life, low power consumption and stable intensity
- External cleaning system for minimal maintenance
- Built-in self-diagnosis and fault detection functions
Specifications
| Parameter | Specification |
|---|---|
| Measuring Range | COD: 0–1000 mg/L; Turbidity: 0–500 NTU |
| Resolution | COD: 0.1 mg/L; Turbidity: 0.5 NTU |
| Accuracy | COD: ±2% of reading or ±2.5 mg/L (whichever is greater); Turbidity: ±5% or ±2.5 NTU (whichever is greater) |
| Repeatability | COD: ±1%; Turbidity: ±1% |
| Response Time | < 1 minute, adjustable |
| Dimensions | Φ42.5 × 279 mm |
| Material | 316L stainless steel |
| Cable Length | Standard 10 m shielded cable; customizable on request |
| Communication | RS485 interface (Modbus RTU protocol) |
| Power Supply | 9–28 VDC |
| Protection Rating | IP68 |
| Max. Installation Depth | 10 m |
| Sample Temperature | 0–45 °C (non-freezing) |
| Ambient Temperature | -5 to 50 °C |
Frequently Asked Questions
Need a customized water monitoring solution?
Contact our engineers today — share your application and we will configure the right instruments for your project.