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Online nitrite nitrogen analyzer

Technical Features:
Touch screen for display and command input;
Multiple sampling and measuring modes;
Unique design;
Lower failure rate;
Less maintenance;
Lower reagent consumption and higher cost performance.


Technical data:
◆   Method of measurement according to: GB/T 7493-1987;
◆   Measuring range: 0.00-1.00 mg/L;
◆   Accuracy: ≤±10%;
◆   Reproducibility: ≤±10%;
◆   Measuring cycle: Min. 35 min;
◆   Sampling cycle: Periodic (with the interval adjustable between 10 min and 9999 min) and hourly measuring modes;
◆   Calibration cycle: Adjustable within the range of 1 to 99 days;
◆   Maintenance cycle: Once every month and approx. 30 min each time in general;
◆   Reagent consumption: <RMB0.35 yuan per sample;
◆   Output: One-channel RS-232 &2-channel 4 ma-20 ma; GPRS communication.   
◆   Environmental requirements: A temperature-controlled room; recommended temperature: +5 °C-28 °C;
Humidity: ≤90% RH (non-condensing);   
◆   Power supply: AC220 V±10%, 50 Hz±10%, 5 A;
◆   Size: 1500 mm high x500 mm wide x450 mm deep;
◆   Others: Fault alarm &no loss of data in the case of power failure;
Touch screen for display and command input;


In the case of fault reset or power ON after power failure, the analyzer automatically discharges residual reagent inside and restores the working condition;ual reagent inside and restores the working condition;



Measuring principle:
In the phosphoric acid medium with a PH of 1.8±0.3, the nitrite reacts with p-aminobenzenesulfonamide (“sulfanilamide” for short) and produces the diazo salt, and then couples with N-(1-naphthyl)-ethylene diamine and produces a red dye; the maximum absorption is realized at the wavelength of 540 nm.