Online automatic monitoring instrument for ammonia nitrogen (NH3-N) in water quality

Online automatic monitoring instrument for ammonia nitrogen (NH3-N) in water quality

1、 Measurement principle:
After mixing water samples with masking agents, ammonia nitrogen in the form of free ammonia or ammonium ions reacts with salicylic acid colorimetric reagent in an alkaline environment and in the presence of sensitizers to form a colored complex. The analyzer detects the change in color and converts this change into ammonia nitrogen value for output. The amount of colored complex generated is equivalent to the amount of ammonia nitrogen.
2、 Main features:Ammonia nitrogen (NH3-N) water quality online automatic monitoring instrument
Touch screen display and command input; Multiple sampling and measurement modes, * design, lower failure rate, lower maintenance, lower reagent consumption, and higher cost-effectiveness.
3、 Technical indicators:
Method basis: * spectrophotometric method HJ 536-2009.
2 Measurement range: 0-1000 mg/L (graded 0-10 mg/L); 0.1 -30 mg/L； 0.5 -100 mg/L； 10-1000 mg/L）。
Accuracy: ≤ 2.0mg/L: ± 0.2 mg/L; ＞2.0mg/L, Not exceeding ± 10%.
4 Repeatability: not exceeding 5%.
5 measurement cycles: The small measurement cycle is 35 minutes, based on the actual water sample.
6 sampling periods: time interval (adjustable from 10 min to 9999 min) and whole point measurement mode.
Calibration cycle: (1~99) days, adjustable at any interval and any time.
8 Maintenance cycle: Generally once a month, about 30 minutes each time.
9. Reagent consumption: less than 0.5 yuan/sample.
10 outputs: 1 RS-232, 1 RS485, 2 4mA to 20mA.
11 Environmental requirements: For indoor environments with adjustable temperature, it is recommended to have a temperature range of+5 ℃ to 28 ℃; Humidity ≤ 90% RH (non condensing).

12 Power supply: AC220 ± 10% V, 50 ± 10% Hz, 5 A.
Size 13: Height 1500 mm x Width 500 mm x Depth 450 mm.
14 Other: Abnormal alarms and power outages will not result in data loss;
Touch screen display and command input;
After abnormal reset and power failure, the instrument will automatically discharge residual reactants and restore working status.

Online automatic monitoring instrument for ammonia nitrogen (NH3-N) in water quality