The QZ300 Ammonia Nitrogen Online Automatic Monitor is specifically designed for continuous online monitoring of ammonia nitrogen concentration in scenarios such as wastewater from pollution sources, surface water, and municipal sewage. It employs the salicylic acid spectrophotometry method (HJ 536-2009), ensuring accurate measurement, stable operation, and simple maintenance. Integrated features include quantitative measurement, sealed digestion, photoelectric detection, and intelligent fault diagnosis, meeting the requirements for environmental online monitoring and data networking.
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Ammonia nitrogen analyzer characteristics
Core Technical Parameters
| Item | Specification |
|---|---|
| Measuring Method | Salicylic Acid Spectrophotometry |
| Measuring Range | 0–50 mg/L, 0–150 mg/L |
| Repeatability | ≤ 2% |
| Measuring Cycle | Min. 30 min |
| Output | 4–20mA, RS485(Modbus) |
| Power | AC 220V, 50Hz |
| Dimensions | 1430×500×403 mm |
Core principle
QZ300 Ammonia Nitrogen Online Automatic Monitor is specially intended for continuous online monitoring of ammonia nitrogen content in such scenarios as wastewater from polluting sources, surface water and municipal sewage. It uses the spectrophotometry of salicylic acid method (HJ 536-2009) ,with accurate measurement , steady operation and simple maintenance . With characteristics of quantitative measure, sealed digestion, photoelectric detection and intelligent fault diagnosis, it has satisfied the needs of environment online monitoring and data networking.
Featured Applications
- The urban sewage treatment plant is used for online monitoring of ammonia nitrogen in the inflow, outflow, biochemical tank, and disinfection effluent, to real-time grasp the operation effect of the treatment process and ensure stable and compliant discharge of effluent.
- Industrial enterprise sewage outlets are suitable for online monitoring of wastewater discharge outlets in industries such as chemical, electroplating, pharmaceuticals, food processing, aquaculture, printing and dyeing, meeting environmental supervision and total control requirements.
- The centralized sewage treatment facilities in industrial parks monitor the real-time concentration of ammonia nitrogen in the comprehensive wastewater collected and treated uniformly in the park, assisting operation and maintenance units in achieving refined control and early warning.
- The automatic monitoring station for surface water and watershed water environment is used for online monitoring of ammonia nitrogen in rivers, lakes, reservoirs, drinking water sources and other water bodies, supporting water environment quality assessment and pollution tracing.

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 QZ300 ammonia nitrogen online automatic monitoring instrument has the core advantages of high precision, high stability, easy operation and maintenance, and low cost, fully meeting the online monitoring needs of industrial wastewater, municipal water treatment, watershed monitoring, and park supervision scenarios. The instrument follows national standard methods and provides accurate and reliable measurement data, which can help users achieve intelligent monitoring of water quality, stable compliance with emission standards, and ecological environment protection.
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