RenQ-1V COD online analyzer
Application field
Widely used for monitoring river and lake water, surface water, water treatment plants, sewage treatment plants, wastewater treatment, purified water, circulating water, boiler water discharge, etc.
working principle
The measurement method adopts the national standard GB11914-89 for water quality chemical oxygen demand determination (potassium dichromate method).
A mixture of water sample, potassium dichromate, silver sulfate (catalyst for more complete oxidation of linear aliphatic compounds), and concentrated sulfuric acid is heated to 175 ℃ in the digestion tank. During this period, the complex ions act as oxidants and are further reduced from VI valence to III valence, resulting in a change in color. The degree of color change corresponds to the content of organic compounds in the sample. The instrument directly displays the COD of the sample through colorimetric conversion
Instrument features
The quantitative pain treatment adopts advanced photoelectric quantitative technology from the United States, with more precise and accurate sampling
Adopting the digestion technology from the United States
Ultra pure light source and receiving system with 610 nanometers of positive and negative 2 nanometers, not affected by colored substances
Low range of 0~200mg/l, which can more accurately measure wastewater concentrations below 20mg/l, suitable for surface water monitoring
※ The dilution factor can be set to automatically dilute the water sample, and the highest concentration of wastewater that can be measured is 22400mg/l
※ With dual filtration, it can adapt to high suspended solids, impurities, and floating water to ensure the stability of the product:
Adopting MasterFlex peristaltic pump technology from the United States
The sampling system adopts Germany's nine way valve technology, completely eliminating the pressure and aging of pipelines
Using a power system specifically designed for the European power system, it is resistant to electromagnetic interference and unstable power grids
Main technical indicators
Measurement method: Potassium dichromate high-temperature digestion, colorimetric determination (national standard GB11914-89)
Test range: 0~22400mg/l (after automatic dilution)
Monitoring lower limit: 8mg/l
Resolution:<1mg/l
Accuracy:>100mg/L<10% reading; ＜100mg/L； Positive or negative 5mg/L
Reproducibility: ＞ 100mg/L ＜ 5% reading; ＜100mg/L； Positive or negative 5mg/L
Response time: (>90%): 15 minutes
Test interval: hourly or at specified intervals (adjustable)
Calibration interval: only performed when replacing reagents
Cleaning interval: automatically performed at the selected interval (duration 10 minutes)
Dissolving temperature: 175 degrees Celsius, adjustable
Service interval: 24 months
User maintenance: Maintenance interval: 1 month, approximately 1 hour per month
Reagent consumption: 6 coal samples, approximately 6 months
Sample flow rate: minimum 0.1L/h
Timed sample making (time can be set), supports remote start of sample making
Display: 5.7-inch ultra large LCD blue screen touch screen: micro printer printing function, with data storage function
Three range options are available: (0-200) mg/l, (0-800) mg/l, and (0-2800mg/l); The dilution factor can be selected according to the water quality, and the maximum automatic dilution is 8 times
Equipped with an automatic sampling system, it can perform timed automatic sampling independently of instrument installation, making it more convenient
Environmental impact: Equipped with a water filtration system, the water quality will not be damaged in extreme situations such as high suspended solids, impurities, floating debris, etc
Maintenance: No vulnerable parts, simple and convenient maintenance
Communication interface: RS232 digital interface (convertible to RS485 interface), analog 4-20mA (20mA corresponds to adjustable range)
Dimensions: 770 (height) * 600 (width) * 450 (depth) millimeters
Power supply: AC 220V ± 20%, 50Hz ± 1%
Environmental temperature: 5-40 degrees Celsius
Atmospheric pressure: 86 kPa~106 kPa
Weight: 50 kilograms
Power: 300 watts
Environmental humidity: ≤ 85%
Sampling outlet: distance L ≤ 15m, drop height H ≤ 6m
