1.Automatic Kjeldahl System 2. Automatic add water and recycle fluid can change. 3. Has the recycling auto-alarm function Automatic Kjeldahl Nitrogen Determination System Model: ZDDN-IIProduct introduction: It is also called Automatic Protein Tester. It is used for testing nitrogen contains in grain, food, dairy products, drink, animal food, soil, medicine, settling, chemical and others. The test ...