Project Description

CN-201C/D Benchtop COD and Ammonia Nitrogen Analyzer

Product Overview

CN-201C/D type COD and ammonia nitrogen analyzer, equapped with finished reagents, easy to operate, measurements are more accurate. COD and ammonia nitrogen can be measured at the same time.

Application Area

Applicable to scientific research institutions.

CN-201C/D type COD, Ammonia Nitrogen Analyzer

  • Equipped with DIS-16B (or optional DIS-20B / 25B / 36B) digestion instrument

  • With printing and USB data upload function

  • 5-inch large color touch screen, both Chinese and English display

  • With one-click recovery function

  • For wastewater testing.

  • With printing function and USB interface upload function.

Working Principle

CN-201C COD and ammonia nitrogen analyzer can directly measure the concentration of COD and ammonia nitrogen in water samples. COD measurement uses fast digestion optical method; and ammonia nitrogen uses Nash reagent method.


  • Using imported high brightness, long life cold light source, the instrument has high stability and repeatability.

  • Separate independent digester and main engine, which does not affect the stability of the optical system.

  • The temperature of digester is controlled and timed automatically by PID with high precision.

  • Free setting of digestion temperature and time for other purposes.

  • Type C can store 300 curves, 1000 records, and type D can store 3500 curves, 100000 records.

  • The optical system is optimized and upgraded (type D). The system is more stable, with better accuracy and stability.

  • With USB interface, data can be transferred to computer, and test records can be printed or queried.

  • The instrument adopts 5-inch large color touch screen operation, easy to operate.

  • Ammonia nitrogen and COD tester has one key recovery function.

  • The system has bilingual function and can switch between Chinese and English.

Technical Indicators

Measurement range: COD NH3N
5 ~ 2000mg / L
(COD can be extended to 20000mg / L)
0.02 ~ 25mg / L
Indication error:  ≤ ± 5% ≤ ± 3%
Repeatability: ≤±3%
Anti-chlorine interference: ≤2000mg/L (COD measurement)
Temperature control accuracy: ≤ ± 1.0 ° C
Temperature control system:  Can be set from room temperature to 200 °C, COD digestion temperature 165 °C
Resolution time: COD is 15 minutes
Optical stability: The absorbance drift is less than 0.002A within 20min
Dimensions: Main unit: 400mm × 310mm × 158mm;
Weight: Main unit: 5kg; Digestion meter: 5.5kg
Temperature control range: Room temperature ~ 200 ℃, COD hydrolysis temperature 165 ℃
Temperature control accuracy: ± 0.5 ℃
Digestion time: 1-9999 min adjustable, COD: 15min
Batch processing capacity: 16 water samples (optional 20b, 25B, 36B)
Power consumption: < 500W
Display screen: 3.5-inch color touch screen, 320×240 resolution, Chinese and English display
Boundary dimension: 355mm × 260mm × 135mm (excluding protective cover)
Weight: Dis-16b: 5.5kg (dis-20b: 6.5kg, dis-25b: 7.0kg, dis-36b: 8.0kg)

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