Automatic Kjeldahl Protein Analyzer
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Automatic Kjeldahl Protein Analyzer

Model: ZDDN-II

TOP INSTRUMENT Automatic Kjeldahl Protein Analyzer is a measuring instrument designed based on the principle of Kjeldahl nitrogen determination. It is mainly used for the determination of sample nitrogen content and protein content. It adopts microcomputer automatic control, and the manual and automatic modes can be switched each other. It has functions such as automatic distillation control, automatic water addition, automatic water level control, and automatic water stop.
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  • TOP


  • Adopt microcomputer controlling process; include manual mode and automatic mode. Can be set and switched according to user's need.

  • Large array LCD display, touch key, easy to operate.

  • Automatically control distill, add water, control water level are cut off water supply.

  • Various security protections: digestive system security device, steam generator water shortage alarm, water level detection fault alarm.

  • Stored operation procedure quantity: 250

  • Instrument shell adopts specially made plastic spray steel. Working area adopts ABS anticorrosive board, avoid chemical reagent corrosion and mechanical surface damage, acid proof and alkali proof.

  • Once detected fault, controlling system will power off automatically.

Measure variety

Foodstuff, feedstuff, foods, dairy products, drink, soil, water, medicine, precipitate and chemical.

Working mode

Automatic and manual (without titration)

Storing data

250 datum

Recovery rate

≥99% (relative error, include digestion process)

Measure range

0.1mgN-200mgN (nitrogen content 0.1%-99%)

Repetition rate

Relative standard deviation<±1%

Working hours

Distillation time: 5-15 minutes, the user can set automatically according to different samples.


AC 220V, 50Hz

Cooling water consumption

Distillation fraction 3L /min (water temperature is less than 20 degrees)

Distillation fraction power supply


To Make The World Closer To The Truth
ZHEJIANG TOP INSTRUMENT CO.,LTD., as a subsidiary of TOP Cloud agri, is a high-tech enterprise specializing in the R&D, manufacturing, sales for laboratory equipments, and provision of comprehensive laboratory solutions.


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