XT-408B portable COD ammonia nitrogen total phosphorus and total nitrogen tester, COD determination using catalytic elimination colorimetric method with closed elimination tube, ammonia nitrogen determination using Nano reagent colorimetric method, total phosphorus using closed elimination colorimetric method, total nitrogen using closed elimination ultraviolet photometric absorption method, all 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, and then directly display the sample COD, ammonia nitrogen and total phosphorus values. COD, ammonia nitrogen and total phosphorus. 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＞50ppm, 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: 190mm*150mm*95mm.

　　XI. Power supply: 2800mA rechargeable power supply

　　XII. Ambient temperature: 5~40℃.

　　XIII, ambient humidity: ≤ 85% non-condensing

　　XIV. Weight: host ＜1.4kg, eliminator ＜2kg

Main features

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

　　2.Ammonia nitrogen is measured by EPA approved method, in accordance with HJ535-2009 standard, accurate and effective.

　　3. Total phosphorus is determined using the U.S. EPA-approved methods, in accordance with HJ670-2013 standards, accurate and effective.

　　4. Total nitrogen is designed and developed according to GB11894-89, with accurate and effective results.

　　5. Imported high brightness and long life cold light source is adopted, with better optical performance and a long life of 100,000 hours.

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

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

　　8. 60 standard curves and 2000 measured values (date, time, parameters, test data) can be saved.

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

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

　　11. With curve override interference function to prevent misoperation from overriding the curve.

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

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

　　14. Optional printing function, can be printed immediately on the measured value or query history printing.

　　15. Built-in large rechargeable battery, long standby time, standby time up to 168 hours.

　　16.Adopting intelligent PID temperature control technology and double anti over-temperature protection system, it is safe, even and fast to heat. It can be used for the digestion of COD, total phosphorus, total nitrogen and other items.

List of standard equipment

Ordering Guidelines

　　1、The constants of the electrodes to be distributed must be informed.

　　2、The length of the electrode cable is 5m without explanation.

　　3、The installation method of electrode.

　　4、Power supply, not specified according to AC220V with.

　　5, if you need to measure and control the resistivity, order type: CON5103B Chinese online resistivity meter.