Technical Parameter

1、 Measurement method: HJ/T399-2007 "Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion spectrophotometric method".

2、 Measurement range: 0-2000mg/L (segmented measurement).

3、 Detection limit: 5 mg/L.

4、 Dissolving temperature: 165 ℃, 15 minutes.

5、 Anti chlorine interference: 1000mg/L.

6、 Resolution: 0.001mg/L.

7、 Accuracy: COD＞50mg/L， The indication error shall not exceed 5%.

8、 Repeatability: The relative standard deviation shall not exceed 3%.

9、 Optical stability: ≤ 0.001A/20 minutes.

10、 Instrument size: 270mm * 220mm * 95mm.

11、 Instrument power supply: AC (220V ± 5%), 50Hz.

12、 Environmental temperature: 5-40 ℃.

13、 Environmental humidity: ≤ 85% without condensation.

14、 Weight: The main unit weighs less than 1.4kg, and the digestion device weighs 6kg.

main features

1. Using EPA approved methods that comply with HJ/T399-2007 standards, the measurement is accurate and effective.

2. Adopting imported high brightness and long-life cold light source, with good optical performance and a light source lifespan of up to 100000 hours.

3.5-inch large LCD screen with full Chinese display, direct data reading, simple and time-saving operation.

4. Integrated digestion and colorimetric analysis, no need to replace the tube, simple and fast measurement, and no safety hazards.

5. It can save 80 standard curves and 1800 measured values (date, time, parameters, test data).

6. Memory standard working curve, users can also calibrate the curve as needed.

7. It has the function of curve coverage interference to prevent accidental operation of covering curves.

8. It has data storage function and data power-off protection function, making it convenient to query historical measurement data and prevent data loss.

9. 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.

Standard List