After the water sample and the masking agent are mixed, the ammonia nitrogen in the form of free ammonia or ammonium ions reacts with the salicylic acid color reagent to form a colored complex in the presence of alkaline environment and sensitizer. The analyzer detects the color change, and converts it into ammonia nitrogen value and outputs it. The amount of colored complexes produced is equivalent to the amount of ammonia nitrogen.

Characteristics:

l Valve components selection. It can select the reagent sampling sequence, with flexible channels, variable functions, minimum dead volume, easy maintenance, long service life and other advantages.

l Printing function. It can be connected to a printer (optional order) to print the measured data in time.

l It adopts 7-inch touch screen, with simple operation interface, easy for users to learn, operate, and maintain.

l Super large data storage capacity. It can realize storage of historical data for no less than 5 years (measurement interval is 1 time/1h), which greatly meets the needs of customers.

l Automatic leakage alarm function. When reagent leakage occurs, the instrument will automatically alarm to remind the user to perform maintenance.

l Light signal recognition function to ensure high accuracy of quantification.

l Simple and convenient chemical reagents maintenance. The reagents can be replaced once a month, which greatly reduces the maintenance of the user.

l U disk one-click upgrade. The software update is much easier.

1 Method basis: Salicylic Acid Spectrophotometry.

2 Measuring range: 0.05-500 mg/L ammonia nitrogen (divided into 0.05-8 mg/L; 0.1-30 mg/L; 5-500 mg/L).

3 Accuracy: no more than ±10% or no more than ±0.2mg/L.

4 Repeatability: no more than ±5% or no more than ±0.2mg/L.

5 Measurement period: The minimum measurement period is 20 minutes. According to the on-site environment, the color development time can be arbitrarily modified within 5 to 120 minutes.

6 Sampling cycle: time interval (10～9999min arbitrarily adjustable) and hourly measurement mode.

7 Calibration cycle: adjustable at any interval any time from 1 to 99 days.

8 Maintenance cycle: generally, once a month, about 30 minutes each time.

9 Reagent consumption: less than 0.50 RMB/sample.

10 Output: 2 channels of RS-232; 1 channel 4-20mA.

11 Environmental requirements: indoor with adjustable temperature, recommended temperature +5～28℃; humidity ≤90% (no condensation).

12 Power supply: AC220±10%V, 50±10%Hz, 5A.