High Precision Ammonia Nitrogen Total Phosphorus COD Analyzer
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.
Technical parameters
| Product | DG-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 |
| Ambient requirement | 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 1450×Width510×Length 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. |
Features
1)The unique design makes this products compared to similar products with lower failure rate, lower maintenance, lower reagent consumption and lower cost.
2)Injection components: vacuum suction peristaltic pump, and the pump tube between the reagent there is always an air buffer, to avoid corrosion of the tubing, while making reagent mixing more concise and flexible.
3)Sealed Digestion components: high -temperature high-pressure digestion system, accelerating the reaction process, to overcome the volatile corrosive gas exposure system equipment corrosion.
4)Reagent tube: imported transparent modified PTFE hose, diameter greater than 1.5mm, reducing the chance of water-like particles clogging.
Installation and production environment
Application
Power Plant water treatment; water plant and sewage treatment plant ;wastewater treatment; paper making production process, paper slurry, chemical refining; metallurgy and mining;Food and beverage;pharmaceutical industry biological reaction and fermentation;Semiconductor production process;high purity water production.Conductivity meter
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