Description: Wastewater led to a sample tank is mixed with quantitative sodium hydroxide. All ammonium salt in the sample is transformed into gaseous ammonia and diffused to a measuring cuvette with quantitative indicator, where the ammonia gas is redissolved to change the color of the indicator. Then, the concentration of ammonia nitrogen in the water sample is obtained by optical determination combined with data processing and calculation. 

     
Features
1. During the testing process, the tested sample is firstly taken to rinse the pipeline and reaction pool, eliminating memory effects produced by the instrument during measurement to make the measurement result more coincide with the actual value.  
2. The gas-liquid phase transformation principle and colorimetric technology are adopted to replace the electrode method which needs much maintenance.
3. The dosing system of high-precision long-life peristaltic pumps ensures high-precision quantification of the sample so as to make the measurement result more accurate.  
High-performance spectrophotometry guarantees reliability and accuracy in detecting ammonia nitrogen. 

Accuracy: The user may set the automatic calibration time, and select different standard samples according to the variation of measurement range, making the instrument have desirable linearity and guaranteeing its accuracy.

Easy operation: The instrument may store up to thousands of arrays of data, adopt touch screen technique and hierarchical management over menus, output COD with 4-20mA analog and transmit COD by MODBUS RTU Protocol, and provide the special protocol data interface according to user requirements, thus ensuring easy operation of the instrument.

Reliability: The advanced structural design adopted makes the circuit and pipeline of the instrument mutually independent and fully isolated so as to avoid mutual influence and guarantee reliability of the instrument.

Consistency: The high-precision peristaltic pump is driven by the high-precision motor to supply the pipeline in a precise way; high-performance spectrophotometry guarantees reliability and accuracy in detecting ammonia nitrogen, and high consistency with the actual ammonia nitrogen value of the water sample.

Intelligentization: When the instrument fails, failure points and corresponding causes may be diagnosed automatically and displayed on the touch screen to guarantee the intelligent instrument.

Convenience: Nanjing Panda provides various reagents for the complete set of instruments, so users may avoid a variety of complicated chemicals and dangers to ensure convenience.

Technical Parameters: