1. Each channel is 100% independent and directly connected to computer without interface module. 2. Air-segmented continuous flow Analysis analysis module. 3. Some of them can be active and the others in stand-by position when all the parameters are not necessary for a batch of samples. 4. Each consoles is independent as the analytical curves and parameters can be displayed on the integrated LCD 5. Automatic pump release or closing it can start and stop automatically. 6. Bichromatic colorimeters which correct for matrix effects by dual wavelength measurements. 7. Analysis method must be totally equal with Korea Standard Analysis Method 8. Full control software.