Design and development in accordance with the requirements of standards such as "HJ/T 399-2007 Water Quality Chemical Oxygen Demand Rapid Digestion spectrophotometric method", "HJ 535-2009 Water Quality Determination of Ammonia Nitrogen Nessler's reagent spectrophotometric method", "GB 11893-1989 Water Quality Determination of Total Phosphorus Ammonium molybdate spectrophotometric method", and "GBT 5750-2006 Standard Test Method for Drinking Water". It has the characteristics of safe and simple operation, fast and accurate detection, and high degree of intelligence. It adopts microcomputer control technology and can directly read concentration. Suitable for the determination of total nitrogen, chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, permanganate index, chromaticity, turbidity, as well as heavy metals such as copper, iron, zinc, manganese, nickel, and various water pollutants in drinking water, surface water, groundwater, domestic sewage, and industrial wastewater.

1. Wavelength range: 380-800nm

2. Display: 7-inch color LCD touch screen;

3. Filter: Standard with 4-wavelength filter;

4. Optical path system: Fiber optic spectroscopic detection system (ZL number:) ZL 2018 2 0182044.4）；

5. Testing items: With nearly 50 preset testing items, it can directly measure COD, ammonia nitrogen, total phosphorus, total nitrogen, chromaticity, turbidity, and various inorganic pollutants; Multiple indicators including total chromium, nickel, copper, zinc, iron, lead and other heavy metals; At the same time, other items can be customized according to the detection requirements, and the setting program can be opened;

6. Storage: It can store 5 million pieces of detection data and can be freely accessed and viewed;

7. Pre stored curve: Pre stored factory standard curve, which can be revised and saved by oneself, or fitted by oneself,;

8. Digestion: comes standard with an independent digestion device;

9. Automatic calibration: The instrument has an automatic calibration function;

10. Printing method: standard built-in printer;

11. Data transmission: equipped with serial port transmission function;

12. Light source: LED light source is used to effectively ensure the stability of the light source;

13. Light source stability: ≤+0.001A/10min; Detection repeatability: ≤± 2%;

14. Detection position: DT3900 (tube colorimetric), DT3900 (dish colorimetric)