Nutrient SensorsTL-NH Series
Ammonia Nitrogen Sensor
Nutrient Sensors
Ammonia Nitrogen Sensor
TL-NH Series
ISE or UV spectroscopy ammonia nitrogen sensor. Range 0–1000 mg/L, IP68, RS485 output.
Request a QuoteProduct Overview
The TL-NH Series measures ammonia nitrogen (NH₃-N) using ion-selective electrode or UV spectroscopy. Critical for biological nitrogen removal process control in municipal and industrial wastewater treatment.
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 | ISE or UV spectroscopy |
| Measuring Range | 0–1000 mg/L (ISE) / 0–100 mg/L (UV) |
| Accuracy | ±10% FS (ISE) / ±5% FS (UV) |
| Temperature Range | 0–40°C (ISE) / 0–45°C (UV) |
| Pressure | 0–2 Bar |
| Signal Output | RS485 Modbus RTU + 4-20mA |
| Power Supply | 12–24 VDC |
| Protection | IP68 |
| Material | SS316L |
Key Features
- Two measurement principles available: ISE and UV
- Critical for BNR (biological nitrogen removal) control
- Continuous online monitoring
- RS485 Modbus RTU for SCADA integration
Typical Applications
Municipal wastewater BNRIndustrial wastewaterRiver/lake monitoringEffluent compliance
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