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CHN Analyzer is a proven instrument which can determine the elemental concentrations in Organic and other type of materials given sample. It has the capability of handling a wide variety of sample types in the field of pharmaceuticals, polymers, chemicals, environmental and energy, including solids, liquids, volatile and viscous samples It is used to measure Carbon (C), Hydrogen (H) and Nitrogen (N). Sample sizes may differ depending on system, but most often in around a few mg. For some sample matrices larger mass is preferred due to sample heterogenicity.

This instrument uses classical Pregl-Dumas method of combustion in a pure oxygen environment to oxidize the sample into simple compounds which are then detected with thermal conductivity detection and infrared spectroscopy. Separation of interference is done by chemical reagents. The design has been field-proven in thousands of laboratories around the world. High-speed microprocessor control, solid-state components and built-in diagnostics provide confidence in performance and reliability
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Key Features

  • Tests 30 samples at one time, the instrument can automatically send samples, fall samples, experiment, test cycle, may increase or decrease and replace the sample at any time during the analysis.
  • Using PID temperature control, furnace temperature control accuracy can reach ± 1°C, thermostatic chamber and air storage tank temperature control accuracy can reach ± 0.1°C.
  • Use absolute pressure sensor for monitoring the whole gas line pressure of the instrument, automatic air tightness check to the whole gas line and furnace, infrared pool, thermal conductivity pool and air storage tank.
  • The instrument uses ultra-low drift infrared pool and thermal conductivity pool as the core component of elemental analysis, so that the experimental results are more accurate.
  • With unique airtightness detection device, can detect the tightness of the gas line in sections under the program control, determine the failure to a specific range. Convenient for gas line maintenance.

Technical Specifications*



Measurement range

1. Cad: 50ppm or 0.005%-100%
2. Had: 200ppm or 0.02%-50%
3. Nad: 80ppm or 0.008%-50%


1. Cad: 0.5%
2. Had: 0.15%
Nad: 0.08%

Single sample analysis time


Sample weighing

Recommended: 100-120mg

Test method

1. Cad: Optimized for low noise, non-dispersive infrared absorption method
2. Had: Optimized for low noise, non-dispersive infrared absorption method
3. Nad: Optimized for low drift, thermal conductivity detection method

Gas specifications required by experiments

1. Carrier gas: helium, purity higher than 99.996%, 0.25 ± 0.01MPa
2. Assistant gas: oxygen, only when carbon and hydrogen measured, the purity higher than 99.50%, when measuring nitrogen, purity higher than 99.995%, 0.25 ± 0.01MPa
3. Power gas: compressed air or nitrogen, must be free of oil and water, 0.25 ± 0.01MPa

Furnace type

Resistance furnace, the maximum temperature 1050°C

Automatic sample-falling head

30 samples loaded at one time

Power supply

1. Detecting Power Supply: AC220V ± 22V, 50Hz, 2A
2. Heating unit: AC220V ± 22V, 50Hz, 20A

Host machine dimension (mm)


Host machine weight (kg)



  • CHN5000 Host machine
  • Lenovo/HP computer (Optional)
  • Printer (Optional)

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