product description

Ammonia nitrogen in water refers to ammonia that exists in the form of free ammonia, mainly derived from the decomposition products of nitrogen-containing organic matter in domestic sewage by microbial action, industrial wastewater such as coking synthetic ammonia, and agricultural drainage. When the ammonia nitrogen content in water is high, it exhibits toxic effects on fish and poses varying degrees of harm to humans. Measuring the ammonia nitrogen content in water helps evaluate the pollution and "self purification" status of water bodies, therefore ammonia nitrogen is an important indicator for characterizing water quality pollution.

Basic principles

After mixing the water sample and masking agent, the ammonia nitrogen formed as free ammonia or ammonium ions reacts with salicylic acid colorimetric reagent in an alkaline environment and in the presence of sensitizers to generate a colored complex. The analyzer detects the color change and converts it into ammonia nitrogen value output. The amount of colored complex generated is equivalent to the ammonia content.

technical specifications

Testing principle: Salicylic acid spectrophotometric method Reference method: HJ 536-2009 Dissolving temperature: 55 ℃ Dissolving time: 5 minutes Measurement range: 0-500 mg/L (expandable) Inspection basis: HJ/T 101-2003 Accuracy: ± 10% Repetitive error: ± 10% Zero drift: ± 10% Range drift: ± 10% Colorimetric wavelength: 700nm Minimum cycle: 30 minutes Analog output: 1 4-20mA output (optional 2 channels), maximum load resistance of 750 Ω Digital output: RS232/RS485 Switch output: 1 relay output (optional 2) Other outputs: Printer output or sending SMS to the target phone number via GPRS to create samples Data storage; Can save measurement data for three years, 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, 5A Dimensions: Height 1430 x Width 500 x Depth 403 (mm)

Ammonia nitrogen water quality online automatic monitoring instrument

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:Manual for Ammonia Nitrogen Water Quality Online Automatic Monitoring Instrument（ Download online）