Features   1. The most advanced technique of flow injection analysis and the most safe and convenient analysis method. 2. Unique automatic enrichment function, make the instrument has a large measurement range. 3. Reagents are non-toxic, just dilute NaOH and containing pH indicator distilled water, which can be easily formulated. The cost of analysis only 0.1 cents for each sample. 4. Unique gas-liquid separator (patented) make sample abandon the cumbersome and expensive former processing device, don't need to clean the equipment, is now the most simplified instrument in a variety of similar products. 5. Operating costs and maintenance costs are extremely low. 6. Of ammonia nitrogen concentration is greater than 0.2 mg/L samples, can use ordinary distilled water as the solvent of reagent, easy to use.