China Online Cod Analyzer for Wastewater

online COD Analyzer for Wastewater

Product description
DG-CODG-3000 online COD Analyzer use principle of the potassium dichromate method for measuring COD: the water sample, potassium dichromate, silver sulfate solution (the catalyst oxidizes the linear aromatic hydrocarbon compound more fully) and concentrated sulfuric acid are heated to 175 ° C in the digestion tank. During this period, the chromium ion is reduced as the oxidant from the VI valence to the III valence and the color is changed. The degree of color change corresponds to the content of the organic compound in the sample, and the instrument directly displays the COD of the sample by colorimetric conversion. The main interference of CODG-3000 potassium dichromate type online COD Analyzer for wastewater cod detection is chloride, which can be removed by adding mercury sulfate to form a complex.

ProductDG-CODG-3000 online COD Analyzer

Standard

Water Quality- Chemical oxygen demand Measurement- Potassium dichromate

Measuring range

5-1500 mg/L;100~5000mg/L;500~15000mg/L COD;

Accuracy

≤±10% when ≥100mg/L; ≤±8mg/L when <100mg/L

Repeatability

≤±10% when ≥100mg/L; ≤±6mg/L when <100mg/L

Value error

≤±10% when ≥100mg/L; ≤±6mg/L when <100mg/L

Measurement period

The minimum measurement period is 35 minutes, according to the actual water sample, The digestion time can be modified from 10 to 120 minutes.

Sampling period

Time interval(55~9999min adjustable by yourself) and

Integral time measurement mode;

Calibration period

Adjustable in 1~99days;

Maintenance period

Usually one time per month and 30 minutes each time

Output

4~20mA( 2 ways) RS232,RS485

It should be indoor and temperature can be adjustable.The recommend temperature is +5~28ºC;humidity≤90%(no dew)

Power

AC220±10% V,50±10% Hz,5 A;

Dimension size

Height 1450xWidth510xLength 450 mm;

Data saved

The data can be saved when abnormal alarms and power off.

Display

Touch screen and Command Input

Other

When Reset after abnormal alarm and power on after off, the instrument automatically discharges residual reactants in the instrument and automatically resumes working status.