1、 Instrument Introduction

The TN-1D digestion and determination integrated total nitrogen detector is a total nitrogen detector developed and designed by our company in accordance with the national standard "HJ 636-2012 Determination of Total Nitrogen in Water Quality - Alkaline Potassium Persulfate Digestion UV spectrophotometry" and industry requirements. This total nitrogen detector has PID automatic adjustment technology and functions such as curve self calibration and automatic zero adjustment, enhancing the accuracy and stability of the instrument; In addition, the total nitrogen detector is equipped with a micro thermal printer that can directly print experimental data; This total nitrogen detector adopts an integrated design of digestion system and detection system, reducing the volume occupied by the instrument and facilitating operation; Widely used for total nitrogen detection in various industries such as laboratories, sewage treatment plants, universities, environmental monitoring departments, and research institutions.

2、 Main features

1. The measurement system adopts advanced optical systems and cold light sources, with high measurement accuracy, small drift, and good stability;

2. Adopting a 13:7 series high brightness large screen LCD display, with a Chinese operating system for easy operation;

3. The integrated design of the digestion system and detection system reduces the volume occupied by the instrument and facilitates operation;

4. The digestion system adopts PID regulation technology, which has high temperature control performance, good stability, and saves energy consumption;

5. The instrument has an automatic calibration function, which can automatically adjust the calibration curve and improve measurement accuracy;

6. The use of spectrophotometry combined with specialized reagents greatly reduces operation time and workload;

7. Built in large capacity storage space, capable of storing 100 curves and 30000 measurement results;

8. The instrument comes with a computer connection interface, which can upload experimental data or connect to a printer to print data;

9. Built in micro thermal printer, capable of directly printing experimental data;

10. The instrument is equipped with dedicated data recording and processing software, which facilitates the storage, processing, and analysis of experimental data;

11. The instrument casing adopts a dedicated sheet metal casing, which is durable and long-lasting;

3、 Technical parameters

1. Measurement method:Alkaline potassium persulfate digestion UV spectrophotometry

2. Measurement range: 0.001-100mg/L (segmented measurement, expandable)

3. Measurement error: ≤ ±5 %

4. Range of photometric measurement: 0-2A

5. Wavelength accuracy: ± 1 nm;

6. Linear photometric measurement: ± 0.002 A;

7. Repeatability of photometric measurement: ± 0.005 A;

8. Accuracy of photometric measurement: ± 0.005 A;

9. Dissolution temperature and time: 120 ± 1 ℃; 30min

10. Measurement time: Dissolve 12 water samples simultaneously within 30 minutes;

11. Temperature indication error: ＜ ±1.5℃；

12. Uniformity of temperature field: ≤ 1.5℃；

13. Error in digestion time indication: ≤ ±3%；

14. Curve parameters: 100 measurement curve parameters can be set;

15. Record storage: capable of storing 30000 measurement results;

16. Printing: Equipped with a built-in micro thermal printer, it can directly print experimental data;

17. Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);

18. Working power supply: AC220V ± 10%/50Hz; DC power supply can work continuously for 50 hours.

4、 Configuration