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Address
2nd Floor East, Building A2, Shunheda Industrial Park, Liuxiandong Industrial Zone, Xili Street, Nanshan District, Shenzhen
Shenzhen Changhong Technology Co., Ltd
2nd Floor East, Building A2, Shunheda Industrial Park, Liuxiandong Industrial Zone, Xili Street, Nanshan District, Shenzhen


CNPN-401C COD, ammonia nitrogen, total phosphorus, and total nitrogen analyzer
Equipped with DIS-16B (or optional DIS-20B/25B/36B) digestion analyzer;
Equipped with printing and USB data upload;
Adopting a 5-inch large screen color touch screen with Chinese and English display;
Equipped with one click recovery function;
Used for wastewater detection.
| 【 Host 】 | ||||
| Measurement range: | COD | Ammonia nitrogen | total phosphorus | total nitrogen |
|
5~2000mg/L (COD can be extended to 20000mg/L) |
0.02~25mg/L | 0.00~10mg/L | 0.10~150mg/L | |
| Indication error: | ≤±5% | ≤±3% | ≤±5% | ≤±5% |
| Repeatability: | ≤±3% | |||
| Anti chlorine interference: | ≤ 2000mg/L (COD determination) | |||
| Temperature control accuracy: | ≤±1.0℃ | |||
| Temperature control system: | Room temperature~200 ℃ can be set, COD digestion temperature 165 ℃, total phosphorus 125 ℃, total nitrogen 125 ℃ | |||
| Dissolving time: | COD is 15 minutes, total phosphorus and total nitrogen are 30 minutes | |||
| Optical stability: | The drift of absorbance within 20 minutes is less than 0.002A | |||
| External dimensions: | Host: 400mm × 310mm × 158mm | |||
| Weight: | Host: 5kg; Dissolver: 5.5kg | |||
| Dissolving instrument | ||||
| Temperature control range: | Room temperature~200 ℃ can be set, COD hydrolysis temperature 165 ℃ | |||
| Temperature control accuracy: | ±0.5℃ | |||
| Dissolving time: | Adjustable from 1 to 9999min COD:15min | |||
| Batch processing capacity: | 16 water samples (optional for 20A, 25B, and 36B) | |||
| power waste: | <500W | |||
| display screen: | 3.5-inch color touch screen with a resolution of 320x240, displaying in both Chinese and English | |||
| External dimensions: | 355mm × 260mm × 135mm (excluding protective cover) | |||
| Weight: | DIS-16B:5.5kg (DIS-20B:6.5kg、DIS-25B:7.0KG、DIS-36B:8.0kg ) | |||
The instrument can directly measure the concentrations of COD, ammonia nitrogen, total phosphorus, and total nitrogen in water samples. COD is a fast digestion optical method; Ammonia nitrogen adopts the Nessler's reagent method; Total phosphorus is obtained using the phosphomolybdenum blue method; Total nitrogen is determined using the alkaline potassium persulfate method.
![]() The multi parameter water quality detector utilizes imported high brightness and long-life cold light sources, with high instrument stability and repeatability. The digestion instrument and the host are separate and independent instruments, which does not affect the stability of the optical system. The digestion instrument has PID automatic temperature control and timing, with high accuracy. The digestion temperature and time can be freely set for other purposes. |
![]() Type C can store 300 curves, while Type D can store 3500 curves; Type C can store 1000 records, while Type D can store 100000 records. Optical system optimization upgrade (D-type), the system is more stable during measurement, with better accuracy and stability. |
![]() Equipped with a USB interface, data can be transferred to a computer, and test records can be printed or queried. |
![]() The instrument adopts a 5-inch large screen color touch screen operation, with a user-friendly interface. The instrument has a one click recovery function. The system has bilingual functionality and can switch between Chinese and English. |
More information about COD ammonia nitrogen total phosphorus total nitrogen analyzer can be viewed in the water quality analysis instrument of Shenchanghong Laboratory.