Ammonia Nitrogen
DNH Ammonia Nitrogen Sensor (ISE Method)
Ammonia Nitrogen
Ion-selective electrode ammonia nitrogen sensor for nutrient monitoring in wastewater treatment and surface water.
- ISE measurement method — no reagents, no secondary pollution
- Real-time temperature and pH compensation with synchronous output
- Continuous online monitoring of NH₄⁺-N, pH and temperature
Overview
An ammonia nitrogen sensor continuously measures the ammonium nitrogen (NH₄⁺-N) concentration in water, providing the feedback signal for nitrification control, aeration optimization and nutrient discharge compliance.
The ion-selective electrode (ISE) selectively responds to specific ions in the solution. The ammonia nitrogen ISE consists of a measuring electrode and a reference electrode; by selectively adsorbing ammonium ions, the sensor generates a corresponding potential difference, enabling rapid and accurate measurement. Integrated pH and temperature sensors dynamically compensate environmental factors for stable, reliable readings.
Typical Applications
Features
- Ion-selective electrode technology — no reagents required, no secondary pollution
- Dynamic compensation for temperature and pH with synchronous multi-parameter output
- Supports both in-situ direct measurement and pretreated sampling for diverse monitoring needs
- Detachable cable design for easier installation and maintenance
- Digital sensor with plug-and-play functionality and automatic recognition
Specifications
| Parameter | Specification |
|---|---|
| Measured Parameters | NH₄⁺-N, pH, temperature |
| Measuring Range | NH₄⁺-N: 0.1–1000 mg/L; pH: 0–14; Temperature: 0–50 °C |
| Resolution | NH₄⁺-N: 0.01 mg/L; pH: 0.01; Temperature: 0.1 °C |
| Accuracy | NH₄⁺-N: ≤ ±10%; pH: ±0.1; Temperature: ±0.2 °C |
| Repeatability | NH₄⁺-N: < ±2%; pH: ±0.1; Temperature: ±0.1 °C |
| Response Time | 90% of final value within 3 minutes |
| Dimensions | Φ58 × 321 mm |
| Material | 316L stainless steel |
| Mounting Thread | 1-inch NPT male thread |
| Cable Length | Standard 10 m shielded cable; customizable on request |
| Digital Interface | RS485 interface (Modbus RTU protocol) |
| Power Supply | 9–28 VDC |
| Protection Rating | IP68 |
| Sample Temperature | 0–40 °C (non-freezing) |
| Ambient Temperature | -5 to 50 °C |
Frequently Asked Questions
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