The GTN-10 total nitrogen online automatic monitoring instrument is designed for continuous online monitoring of total nitrogen concentration in surface water, municipal sewage, industrial wastewater and other water bodies. It adopts alkaline potassium persulfate digestion ultraviolet spectrophotometry (national standard HJ 636-2012), integrates automatic sampling, high temperature and high pressure digestion, colorimetric detection, data storage and remote transmission, and can operate stably without human supervision for a long time. It is widely used for real-time monitoring of total nitrogen in pollution source discharge, watershed water environment, sewage treatment plants and other scenarios.
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Total Nitrogen analyzer characteristics
Core Technical Parameters
| Item | Specification |
|---|---|
| Measuring Method | Alkaline Potassium Persulfate Digestion & UV Spectrophotometry |
| Measuring Range | 0~10mg/L, 0~50mg/L, 0~100mg/L |
| Limit of Quantitation | ≤0.05mg/L |
| Indication Error | ≤±5% |
| Repeatability | ≤2% |
| Measuring Cycle | Min. 20 minutes |
| Calibration Interval | 1~99 days adjustable |
| Maintenance Cycle | Once a month, approx. 1 hour |
| Signal Output | 4~20mA, RS485(Modbus), Relay |
| Power Supply | AC220V±10%, 50Hz |
| Operating Environment | 5~40℃, Humidity ≤90% (non-condensing) |
| Dimensions (H×W×D) | 1500×500×450mm |
Core principle
In alkaline, high temperature and high pressure conditions, water samples are evenly oxidised and digested by potassium sulphate, and all forms of nitrogen are converted into nitrate nitrogen; 2. Measure the absorbance at two ultraviolet wavelengths of 220nm and 275nm, remove the interference of organic matter by formula correction and automatically calculate the total nitrogen concentration. The measurement procedure conforms to national standards, and the data are precise, authoritative and traceable.
Featured Applications
- Urban sewage treatment plant: online monitoring of total nitrogen in the inlet, anaerobic/aerobic section, and outlet to ensure stable denitrification process and compliant discharge
- Industrial enterprise sewage outlets: supervision of total nitrogen in wastewater from industries such as chemical, pharmaceutical, electroplating, food, printing and dyeing, and aquaculture
- Centralized sewage treatment facilities in industrial parks: real-time monitoring and warning of total nitrogen concentration in comprehensive wastewater
- Rivers, lakes, reservoirs, and drinking water sources: automatic monitoring stations for watershed water quality to assess the risk of eutrophication in water bodies
- Municipal drainage network/pump station: monitoring of total nitrogen in drainage, prevention and control of illegal discharge, leakage and sudden pollution incidents
Installation and Maintenance
- Things you need to install：You need a separate monitoring station that is at least 10 square meters in size, with a level, corrosion-resistant floor, air conditioning, a solid power source, and adequate grounding.
- Requirements for pipelines：The sampling tube, overflow tube, and waste liquid tube are all set up independently so that there is no blockage or backflow. This keeps the water samples stable while they are being moved.
- Regular upkeep：Do maintenance once a month for about one to two hours each time, and change out reagents, consumables, and peristaltic pump tubing on a regular basis.
- Cleaning and taking care of:Automatic cleaning of pipelines and regular cleaning of measurement tubes and digesting units to keep them from getting blocked or crystallizing.
- Managing Calibration:It can be calibrated automatically or manually, and the cycle can be set to last anywhere from 1 to 99 days, making sure that readings stay accurate over time.
- Treatment of waste fluids:Collect and analyze waste liquids in a consistent way, get rid of them in a way that follows hazardous waste rules, and don’t let them out directly.
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The GTN-10 total nitrogen water quality online automatic monitoring instrument has core advantages of high precision, high stability, full automation and low operation and maintenance, which fully meet the online monitoring needs of total nitrogen in municipal sewage, industrial discharge, watershed water environment and others. This instrument is in compliance with the national standard, with the accuracy and reliability of measurement data, high degree of automation and strong environmental adaptability. It can successfully help customers to realise intelligent monitoring of water quality, optimisation of denitrification process and stable compliance with emission regulations.
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