What is the national standard for total nitrogen online monitoring equipment?

1、 Principle

In an alkaline medium at 120 ℃, using potassium persulfate as an oxidant can not only convert ammonia nitrogen and nitrite nitrogen in water into nitrate, but also convert most of the organic nitrogen into nitrate. Then, the absorbance can be measured at a specific wavelength using a UV spectrophotometer

2、 Product Features

The new photoelectric quantitative technology is not affected by interference such as high chromaticity, suspended solids, and bubbles, with high reliability and accuracy, and strong anti-interference ability.

High detection accuracy, low measurement limit, and small long-term drift of the instrument.

It has one click self-test function and self diagnostic function.

Adopting a single channel highly integrated valve group, maintenance and cleaning are simple and fast.

24/7 networking function, monitoring instrument operation status anytime, anywhere.

Equipped with alarm function, quality control function, and reverse control function.

Equipped with automatic cleaning and calibration functions.

Capable of whole point measurement, interval measurement, and external control measurement.

Automatically work after power failure recovery.

Automatic prompt and reset function for faults and missing reagents (samples).

Equipped with fault recording function.

Can save historical data for more than 3 years.

Separate the discharge of cleaning solution and waste liquid

3、 Technical parameters

Measurement method: Alkaline potassium persulfate digestion UV spectrophotometry

Measurement range: 0-5 mg/L; 0-20 mg/L; 0-50 mg/L; Customizable range

Indication error: ≤± 5% Detection limit: 0.01mg/L

Repeatability: ≤± 3% Waste liquid volume: 6mL/time

Memory effect: ≤± 1% Actual water sample comparison: ± 10%

Constant temperature time: 900 seconds Voltage stability: ≤± 5%

Measurement cycle: 51 minutes Calibration cycle: any specified time

Maintenance cycle: ≥ 720h/time Maintenance workload:<2 hours/month

Reagent consumption: 3 months/500ml Display output: Equipped with a 10.1-inch color LCD touch screen

Color rendering temperature: The recommended temperature is 125 ℃, which can be set according to the actual water sample situation

Data export: Measurement values can be imported into a USB drive through a USB port and saved

Signal output: RS485/RS232/USB interface/standard 2-channel 4-20mA output/standard 2-channel switch input/output

Environmental requirements: Temperature controlled indoor environment, recommended temperature (5-28 ℃), humidity ≤ 90% (no condensation)

Power supply and output: (220V ± 22) V/AC, (50 ± 0.5Hz), 5A, 150W

Instrument size: Upper cabinet 600 * 450 * 300mm; Upper cabinet 700 * 450 * 300mm