Detection principle:

The determination of COD adopts the closed catalytic digestion colorimetric method with a digestion tube, the determination of ammonia nitrogen adopts the Nessler's reagent colorimetric method, and the determination of total phosphorus adopts the closed digestion colorimetric method, all of which are recognized by the US EPA. After imported cold light source, narrowband interference technology, and microcomputer automatic data processing, the COD, ammonia nitrogen, and total phosphorus values of the sample are directly displayed in mg/L.

Product Features:

1. The determination of COD meets the HJ/T399-2007 standard and is accurate and effective.
2. The determination of ammonia nitrogen meets the HJ535-2009 standard and is accurate and effective.
3. The determination of total phosphorus meets the HJ670-2013 standard and is accurate and effective.
4. Adopting imported high brightness and long-life cold light source, with excellent optical performance and a light source lifespan of up to 100000 hours.
5. 5-inch large LCD screen with full Chinese display, direct data reading, simple and time-saving operation.
6. Dissolve colorimetric integrated, no need to replace tube, simple and fast measurement, no safety hazards.
7. Can save 80 standard curves and 1800 measured values (date, time, parameters, test data).
8. The memory standard working curve, and users can also calibrate the curve as needed.
9. One click factory reset allows for quick recovery in case of curve loss due to misoperation.
10. It has the function of curve coverage interference to prevent accidental operation of covering curves.
11. It has data storage function and data power-off protection function, making it convenient to query historical measurement data and prevent data loss.
12. Equipped with a USB interface, data can be transferred to the computer for permanent storage.
13. It has a printing function and can print the measured values immediately or query the historical records for printing.
14. The digestion instrument adopts intelligent PID temperature control technology and a dual anti overheating protection system, ensuring safe and uniform heating with fast speed. Used for the digestion of COD, total phosphorus, total nitrogen and other projects.

Technical Specifications: