Organic Matter SensorsTL-BOD-201X
BOD Sensor
Organic Matter Sensors
BOD Sensor
TL-BOD-201X
Dual-wavelength UV BOD sensor. Reagent-free, range 0–100 mg/L, IP68, RS485 output.
Request a QuoteProduct Overview
The TL-BOD-201X uses dual-wavelength ultraviolet absorption to estimate BOD (Biochemical Oxygen Demand) without reagents. Provides continuous online BOD estimation for wastewater treatment process control.
Working Principle
The sensor uses a continuous online measurement principle with automatic temperature compensation. The measurement signal is processed by an integrated microprocessor and transmitted via RS485 Modbus RTU for direct integration with PLCs, data loggers, and SCADA systems. The 4–20 mA analog output provides compatibility with legacy control systems.
Wiring & Signal Output
Power supply: 12–24 V DC (standard); 220 V AC with adapter
Primary output: RS485 Modbus RTU (address configurable 1–247)
Analog output: 4–20 mA (proportional to measured value)
Relay output: 2 × SPDT relay for alarm / dosing control
Communication: Modbus RTU function codes 03 / 06 / 16
Cable entry: M16 cable gland, IP68 submersible cable available
Technical Specifications
| Parameter | Value |
|---|---|
| Measurement Principle | Dual wavelength UV absorption |
| Measuring Range | 0–100.0 mg/L |
| Accuracy | ±5% FS |
| Resolution | 0.1 mg/L |
| Working Conditions | 0–50°C, 0–1 Bar |
| Power Supply | 12–24 VDC |
| Connection | 3/4" NPT Thread |
| Signal Output | RS485 Modbus RTU |
| Calibration | 2-point calibration |
| Protection | IP68 |
| Cable Length | 5m |
| Material | POM + stainless steel |
Key Features
- Dual-wavelength UV absorption measurement
- Reagent-free continuous BOD estimation
- Suitable for process control and compliance
- 2-point calibration
Typical Applications
Municipal wastewater treatmentIndustrial effluent monitoringRiver water qualityProcess optimization
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