Industrial Sewage Online Ammonia nitrogen Water Quality Analyzer
>>Overview
Ammonia nitrogen in water refers to ammonia existing in its free
form, primarily originating from the decomposition of nitrogenous
organic matter in domestic wastewater by microbial activity,
industrial effluents such as coking and synthetic ammonia
production, and agricultural drainage. Elevated ammonia nitrogen
levels in water bodies pose toxic effects on aquatic life and
varying degrees of harm to humans. Measuring ammonia nitrogen
concentrations aids in assessing water pollution levels and
"self-purification" status, making it a critical indicator of water
quality contamination.
This analyzer is designed for long-term unattended and automatic continuous operation based on field configurations. It is widely applicable to
scenarios including industrial wastewater discharge, municipal
sewage treatment plant effluent, and environmental quality surface
water monitoring. Depending on the complexity of on-site
conditions, optional preprocessing systems can be integrated to
ensure reliable testing processes, accurate results, and full compliance with diverse on-site requirements.
>>Principle
The analyzer employs the salicylate colorimetric method. After mixing the water sample with a masking agent, ammonia
nitrogen (existing as free ammonia or ammonium ions) reacts with
salicylate ions and hypochlorite ions under alkaline conditions in
the presence of a sensitizing agent, forming a colored complex. The
analyzer detects this chromatic change, converts it into an ammonia
nitrogen concentration value, and outputs the result. The amount of colored complex formed corresponds to the ammonia
nitrogen concentration.
>>Technical Parameter
| Test Method | Salicylic Acid Spectrophotometric Method |
| Measuring Range | 0~300mg/L (segmented measurement, expandable) |
Indication Error | 20% range standard solution: ≤±10% 50% range standard solution: ≤±8% 80% range standard solution: ≤±5% |
| Quantitative Lower Limit | ≤0.15mg/L |
| Repeatability | ≤2% |
Drift (24h) | Low concentration drift: ≤0.02mg/L High concentration drift: ≤1% |
| Measurement Time | <30min (digestion time adjustable) |
| Measurement Modes | Adjustable time interval, fixed time point, or triggered
measurement |
Calibration Modes | Automatic calibration (1~99 days adjustable) Manual calibration based on actual water samples |
Maintenance Cycle | 1 month per session; ~30min per maintenance
|
| Human-Machine Interface | Touchscreen display and command input |
Self-Diagnosis & Protection | Self-diagnoses operational status; retains data during
anomalies/power outages Automatically clears residual reactants and resumes operation after
reset/power recovery |
| Data Storage | 5-year data capacity |
| Input Interface | Digital input |
Output Interfaces | 1× RS232, 1× RS485 2× 4~20mA analog outputs |
Operating Environment | Indoor use; recommended temperature: 5~28℃, humidity ≤90%
(non-condensing) |
Power Supply | Voltage: AC 220±10% V Frequency: 50±0.5 Hz Power: ≤150W (excluding sampling pump) |
Dimensions | 520H × 370W × 265D (mm) |
