... 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 ... on.2. Number of test sample: Solid less 5 pcs, Liquid less 15ml3. Measurement Range: 0.1mgN ~200mg N(0.02 ...