COD Analyzer

1.COD Analyzer principle

COD Analyzer uses spectrophotometry to determine the Chemical Oxygen Demand (COD) and is the ideal solution for monitoring water or wastewater contamination.A quantitative potassium dichromate solution was added to the sample.In a strong acidic medium, silver sulfate was used as a catalyst, and the chloride ion concentration was reduced using a unique dilution injection technique, and a combined masking of high concentration of chloride ions was used.After digestion after high temperature and high pressure, the COD concentration value was determined by spectrophotometry.

2.COD Analyzer product features

The new optoelectronic quantitative technology is not affected by interference such as large chromaticity, many suspended objects, and many bubbles.It has high reliability and accuracy and strong anti-interference ability.

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

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

It adopts a single-channel high-integrated valve set, making maintenance and cleaning simple and fast.

All-weather networking function, monitoring the operating status of the instrument anytime and anywhere.

It has alarm function, quality control function and counter control function.

It has automatic cleaning function and automatic calibration function.

It has full-point measurement, interval measurement and external control measurement.

It works automatically after power failure recovery.

Automatic prompts and automatic reset functions for faults and reagents (samples).

It has fault logging function.

Can save historical data for more than 3 years.

Satisfies the separation of cleaning liquid and waste liquid

3.COD Analyzer Technical Parameters

Measurement method: According to standard HJ828-2017 "Water quality-chemical oxygen consumption determination-dichromate method"

Measuring range: 0-200 mg/L; 0-500 mg/L; 0-1000 mg/L; range can be customized

Display error: ≤±3% detection limit: 10mg/L

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

Memory effect: ≤±3%Real water sample comparison: ±8%

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

Measurement cycle: 39 minutes Calibration cycle: any specified time

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

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

Color rendering temperature: The recommended temperature is 165℃, which can be set according to the actual water sample condition

Data export: The measured value can be imported into the USB drive and saved in the USB drive.

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

Environmental requirements: Indoors with controllable temperature, recommended temperature (5-28℃), humidity ≦90% (no condensation)

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

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