XT-308 COD ammonia nitrogen and total phosphorus detector, COD determination using the elimination tube closed catalytic elimination colorimetric method, ammonia nitrogen determination using the Nano reagent colorimetric method, total phosphorus using the closed elimination colorimetric method, are recognized by the U.S. EPA method, and then imported cold light source, narrow-band interference technology and microcomputer automatic processing of the data, the direct display of samples COD, ammonia nitrogen and total phosphorus values. The instrument is widely used in environmental monitoring, sewage treatment, scientific research units and universities and colleges.

Technical parameters

　　I. Measuring parameters: COD (chemical oxygen demand), ammonia nitrogen, total phosphorus, total nitrogen.

　　Measuring method: HJ/T399-2007 “Rapid Elimination Spectrophotometry”, HJ535-2009 “Nano Reagent Spectrophotometry”, HJ671-2013 “Ammonium Molybdate Spectrophotometry”, Alkaline Persulfate Elimination Photometry.

　　III. Measuring range: 0-10000mg/L (subsection), 0-50mg/L (subsection), 0-20mg/L (subsection), 0-100mg/L (subsection).

　　IV. Lower detection limit: 5 mg/L, 0.05 mg/L, 0.02 mg/L, 0.1 mg/L.

　　V. Ablation temperature: 165℃, 15 minutes, without ablation 125℃, 30 minutes, 125℃, 30 minutes.

　　VI. Resolution: 0.001mg/L.

　　VII、Accuracy: COD＞50mg/L, the error of display value is not more than 5%, the error of display value is not more than 5%.

　　VIII. Repeatability: relative standard deviation not more than 3%.

　　Nine, optical stability: ≤ 0.001A / 20 minutes.

　　X. Size: 310*230mm*150mm.

　　XI. Power supply: AC (220V±5%), 50Hz.

　　XII. Ambient temperature:5~40℃.

　　XIII. Ambient humidity:≤85% non-condensing.

　　XIV. Weight:＜3kg for the main unit and 6kg for the disintegrator.

Main features

　　1.COD detector using the U.S. EPA approved methods, in line with the HJ/T399-2007 standard, accurate and effective determination.

　　2. Ammonia nitrogen tester uses the U.S. EPA approved methods, in line with HJ535-2009 standards, accurate and effective measurement.

　　3. The total phosphorus tester uses the U.S. EPA approved methods, in line with the HJ670-2013 standard, accurate and effective measurement.

　　4. It adopts imported high brightness and long-life cold light source, with good optical performance, and the life span of the light source is up to 100,000 hours.

　　5.5-inch large screen LCD, Chinese display, direct reading of data, simple and time-saving operation.

　　6. The digestion and colorimetry is integrated, no need to change the tube, determination is simple, fast, no safety hazards.

　　7. 80 standard curves and 1800 measured values (date, time, parameters, test data) can be saved.

　　8. Memory standard working curve, the user can also be required to calibrate the curve.

　　9. One key to restore factory settings, can be quickly recovered when the curve is lost due to misoperation.

　　10. With data storage function and data power failure protection function, it is convenient to query historical measurement data and prevent data loss.

　　11. With USB interface, the data can be transferred to the computer for permanent preservation.

　　12. With printing function, the measured value can be printed immediately or query history record printing.

　　13.Adopt intelligent PID temperature control technology and double anti-temperature protection system, safe and uniform heating, fast speed. It can be used for the dissolution of COD, total phosphorus, total nitrogen and other items.

List of standard equipment