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Online CODcr COD Water Quality Analyzer Potassium Dichromate Oxidation Spectrophotometric Method Monitor

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Online CODcr COD Water Quality Analyzer Potassium Dichromate Oxidation Spectrophotometric Method Monitor

Brand Name : JUGE

Model Number : AG9000

Certification : IOS9001, CE

Place of Origin : Nanjing, China

MOQ : 1 Unit

Price : USD2000-7000

Packaging Details : Neutral carton

Delivery Time : 5-8 working days

Payment Terms : Online order,T/T

Supply Ability : 100 Unit/Week

‌Test Method‌ : Potassium dichromate oxidation spectrophotometric method

‌Measuring Range‌ : 0~5000mg/L (segmented measurement, expandable)

‌Indication Error‌ : ≤±5%, ≤±8%, ≤±10%

‌Quantitative Lower Limit‌ : ≤15mg/L

‌Repeatability‌ : ≤5%

‌Power Supply‌ : AC 220±10% V

‌Dimensions‌ : 520H × 370W × 265D (mm)

Weight‌ : 40kg

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Online CODcr COD Water Quality Analyzer Potassium Dichromate Oxidation Spectrophotometric Method Monitor


>>Overview

Chemical Oxygen Demand (COD) refers to the mass concentration of oxygen consumed by strong oxidants under specific conditions to oxidize organic and inorganic reducing substances in water samples. COD is a critical indicator reflecting the extent of water pollution caused by organic and inorganic reducing substances.

This analyzer is designed for long-term, unattended, automatic, and continuous operation based on field configurations. It is widely applicable to scenarios such as industrial pollution source wastewater discharge, industrial process wastewater, industrial wastewater treatment plant effluent, and municipal sewage treatment plant effluent. Depending on the complexity of on-site testing conditions, optional preprocessing systems can be integrated to ensure reliable testing processes, accurate results, and full compliance with diverse on-site requirements.


>>Features‌‌
A mixture of the water sample, potassium dichromate digestion solution, silver sulfate solution (added as a catalyst to enhance oxidation efficiency for straight-chain aliphatic compounds), and concentrated sulfuric acid is heated to 165°C. After the dichromate ions oxidize organic substances in the solution, a color change occurs. The analyzer detects this colorimetric change, converts it into a COD value output. The amount of dichromate ions consumed corresponds to the quantity of oxidizable organic matter, which is quantified as the COD value.


>>Technical Parameter

‌Test Method‌

Potassium dichromate oxidation spectrophotometric method
‌Measuring Range‌

0~5000mg/L (segmented measurement, expandable)

‌Indication Error‌

20% range standard solution: ≤±10%

50% range standard solution: ≤±8%

80% range standard solution: ≤±5%
‌Quantitative Lower Limit‌

≤15mg/L
‌Repeatability‌

≤5%

‌Drift (24h)‌

Low concentration drift: ±5mg/L

High concentration drift: ≤5%
‌Masking Capacity‌

Up to 20,000mg/L Cl⁻
‌Measurement Time‌

<50min (digestion time adjustable)
‌Measurement Modes‌

Adjustable time interval, fixed time point, or triggered measurement

‌Calibration Modes‌

Automatic calibration (1~99 days adjustable)

Manual calibration based on actual water samples

‌Maintenance Cycle‌

1 month per session; ~30min per maintenance
‌Human-Machine Interface‌

Touchscreen display and command input

‌Self-Diagnosis & Protection‌

Self-diagnoses operational status; retains data during anomalies/power outages

Automatically clears residual reactants and resumes operation after reset/power recovery
‌Data Storage‌

5-year data capacity
‌Input Interface‌

Digital input

‌Output Interfaces‌

1× RS232, 1× RS485

2× 4~20mA analog outputs

‌Operating Environment‌

Indoor use; recommended temperature: 5~28℃, humidity ≤90% (non-condensing)

‌Power Supply‌

Voltage: AC 220±10% V

Frequency: 50±0.5 Hz

Power: ≤150W (excluding sampling pump)

‌Dimensions‌

520H × 370W × 265D (mm)



Product Tags:

spectrophotometric method water quality monitor

      

spectrophotometric method water quality analyzer

      
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