KNN300 series online nitrate nitrogen analyzer is an online water quality analyzer developed on the basis of digital water quality analysis platform. Integrated design, using industrial on- line ion selective electrode, digital, intelligent analyzer design concept. The functions of electrode signal detection, temperature detection, automatic compensation and digital signal conversion are realized in the instrument. RS485 signal output, easy networking and system integration, widely used in surface water, pollution sources and other industries.
1) Characteristics of KNN300 series online nitrate nitrogen analyzer
Integrated design, anti-electromagnetic interference
Industrial Online ion-selective electrode, can work stably for a long time
Temperature, chloride ion (CL–) and other multi-parameter compensation algorithm to ensure the accuracy of measurement
Built-in Air Purge automatic cleaning system, greatly reducing the maintenance workload
Stainless steel case, IP68 waterproof grade, suitable for various working conditions
RS485 signal output, Standard Modbus protocol, easy integration, networking
2) Technical Specifications
| Model number | KNN300A | KNN300B |
| Measurement parameter | NO3-N, pH,temperature | NO3-N, pH, CL-, temperature |
| Method of measurement | Ion selective electrode method | |
| Measurement mode | Immersion measurement | |
| Measuring range | No 3-n: (0.1-1) mg/l, (1-10) mg/l, (10-100) mg/l, (100-1000) mg/L | |
| Cl-: (1 ~ 1000) mg/L | ||
| PH: 0 ~ 14 | ||
| Temperature: (0 ~60) °C | ||
| Accuracy | ≤±3% | |
| Repeatability | ≤2% | |
| Resolution | No3-n (minimum range) :0.01 mg/L | |
| Cl-: 0.1 mg/L | ||
| Ph: 0.01 | ||
| Detection limit | 0.1 mg/L | |
| Response time | ≤60s | |
| Zero Drift (24h) | ≤3% F.S. | |
| Range Drift (24h) | ≤3% F.S. | |
| Calibration period | Three months | |
| Temperature range | (0 ~ 60) °C | |
| Protection level | IP68 | |
| Cleaning mode | Compressed air bar | |
| MTBF | ≥1440h/Time | |
| Means of communication | RS485(Modbus RTU), maximum baud rate 115200 bps | |
| Supply voltage | (12/24) V DC | |
| Power consumption | < 0.5W | |
| Material Quality | Stainless steel, POM | |
| Weight | 1.0 kg | |
| Contour dimension | 270 mm × φ60 mm | |
