Water quality monitoring system of Online TN Analyzer – HATN-4000


HATN-4000 is a measuring instrument that automates the ultraviolet / visible spectroscopy (thermal oxidation method) of the water pollution test method. In the pretreatment step, alkaline potassium persulfate is injected into the sample, and the sample is heated at 120°C for 30 minutes to oxidize and decompose organic and inorganic nitrogen compounds into nitrate ions. After cooling, hydrochloric acid is added to lower the acidity, and ultraviolet absorbance is measured at 220nm to measure total nitrogen. At this time, it is possible to measure more accurately by measuring the absorbance of the disturbance factor at 275nm to calibrate the measurement value. HATN-4000 not only improves efficiency by adopting patented technology and newly-developed oxidation reaction chamber, it is KORBI new product with sophisticated design and users convenience.



Adoption of oxidation reaction chamber with improved efficiency

Application of multi-channel valve for quantitative distribution of samples and reagents

Built-in user-oriented operating program with enhanced security function

Built-in functions to enhance user convenience


    • Measurement item

Total Nitrogen (TN)

    • Measurement method

UV Absorption photometry

    • Measurement range

0~100mg/L (Adjustable)

    • Wavelength

220nm (275nm for compensation)

    • Measurement interval

60 minutes (Adjustable)

    • Detection limit

0.6mg/L F.S. or less

    • Accuracy

±2% F.S.

    • Reproducibility

±2% F.S.

    • Linearity

±3% F.S.

    • Zero/Span drift

±2% F.S.

    • Oxidation method

120℃ persulfate thermal oxidation

    • Calibration

Auto/manual calibration by standard solution

    • Sample/Reagent measuring method

Step motor pulse control

    • Sample/Reagent distribution method

7-port distribution control method (Fixed quantity injection with multi-channel valve system)

    • Operation system

Windows 7 Pro

    • Output

DC 4~20mA, RS-232C

    • Status display

Normal operation, on calibration, error

    • Display

Color LED 10.4″ (Touch screen)

    • Power

AC 220V, 50/60Hz

    • Power consumption

Average 150W(Maximum 450W)

    • Voltage regulation

3% or less

    • Data storage capacity

HDD 100G or more

    • Data output

USB terminal

    • Enclosure/Size

Steel, 1.5T (Except paint) / 645(W) x 439(D) x 1600(H) mm

    • Operating humidity

RH 95% or less