Product Overview

Nitrous nitrogen (NO) refers to the nitrogen content in soluble and suspended particles in water, including nitrite nitrogen, nitrate nitrogen, inorganic ammonium salts, dissolved ammonia, and nitrogen in most organic nitrogen-containing compounds. When lakes and reservoirs contain excessive nitrogen and phosphorus substances, it causes vigorous reproduction of phytoplankton and leads to eutrophication. Therefore, eutrophication caused by nitrate nitrogen has become a major global environmental issue that countries around the world attach great importance to, and nitrate nitrogen has also become one of the important indicators for controlling water quality.

working principle

Quantitatively determine nitrate by utilizing the absorption of nitrate ions at a wavelength of 220nm. Dissolved organic matter also absorbs at 220nm, while nitrate ions do not absorb at 275nm. Therefore, another measurement was taken at 275nm, and the corrected absorbance A was calculated according to the formula A=A220-2A275 to correct the nitrate nitrogen value.

technical specifications

Testing principle: UV spectrophotometry Measurement range 0-100mg/L (expandable) Colorimetric wavelengths of 220nm and 275nm Minimum cycle of 40 minutes Accuracy ± 10% Repetitive error ± 10% Zero drift ± 5% Range drift ± 10% Analog output 1 channel 4-20mA output (optional 2 channels), maximum load resistance 750 Ω Digital output RS232/RS485 Switch output 1 relay output (optional 2) Other output printers can output or send samples to the target phone number via GPRS via SMS Data storage can store measurement data for three years, and the data can be stored cyclically Data export measurement values can be imported into a USB drive through a USB port and saved Power supply AC220 ± 10% V, 50 ± 10% Hz Dimensions: Height 1430 x Width 500 x Depth 403 (mm)

Online automatic monitoring instrument for nitrate and nitrogen water quality

Product Features

Modular design allows each component to operate independently, improving the efficiency of the instrument;

• Various types of signal outputs: printers RS485/RS232、4-20mA、GPRS、 Relays, etc;

Various sample making methods: manual control, timed (interval and hourly) control, 4-20mA current input control, switch control, and other forms;

Automatic compensation for measuring light source attenuation, good stability, and small drift;

Wide range of measurement, fast sampling speed, and high accuracy;

Low dosage of medication, maintenance free for one month;

Optoelectronic non-contact measurement, high measurement accuracy, and high operational reliability;

Adopting high-resolution industrial grade color touch screen, user-friendly interface, configuration design, and simple operation.

application area

•Online monitoring of industrial pollution source wastewater

•Online monitoring of industrial process water usage

•Online monitoring of water quality at the inlet and outlet of municipal sewage treatment plants

•Online monitoring of river, lake, reservoir, and groundwater quality

Product manual:Instruction manual for nitrate nitrogen water quality online automatic monitoring instrument（ Online download)