Brand：NANBEI Model：KDN-04A Kjeldahl Nitrogen Analyzer is a special instrument for detecting nitrogen content in agricultural and sideline products such as seeds, dairy products, beverages, feed, and soil. The nitrogen analyzer is an instrument that calculates the protein content by measuring the nitrogen content in the sample based on the principle that the nitrogen content in the protein does not change. Because the method of measuring and calculating protein content is called Kelvin nitrogen determination method, it is called Kelvin nitrogen analyzer, also known as protein analyzer and crude protein analyzer. The instrument is also widely used in food plants, drinking water plants, drug inspection, fertilizer determination, etc.