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Dichromate Method CODcr Analyzer Chemical Oxygen Demand Analyzer with RS-485 Output and 30min Measurement Period for Industrial Wastewater

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Dichromate Method CODcr Analyzer Chemical Oxygen Demand Analyzer with RS-485 Output and 30min Measurement Period for Industrial Wastewater

Principle : National Standard HJ 828-2017 "Water Quality-Determination of Chemical Oxygen Demand-Potassium Dichromate Method".

Model Number : AG-C07

Repeatability : ≤5%

MOQ : 1 Unit

Delivery Time : 5-8 working days

Range : 10-5000mg/L OEM

Certification : IOS9001, CE

Packaging Details : Neutral carton

Output : RS-232, 4-20mA, RS-485

Payment Terms : Online order,T/T

Indication Error : ≤±8% for concentrations <100 mg/L; ≤±5% for concentrations ≥100 mg/L.

Place of Origin : Nanjing, China

Type : Codcr

Brand Name : JUGE

Measurement Period : 30min

Price : USD2000-7000

Specification : 1500*500*450mm

Supply Ability : 100 Unit/Week

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Application

This method is suitable for wastewater with a chemical oxygen demand (COD) ranging from 10 to 5000 mg/L and chloride ion (Cl⁻) concentrations below 2 g/L. Based on actual user requirements, it can also be applied to wastewater with chloride ion (Cl⁻) concentrations below 20 g/L.

Technical Parameters
Method Basis National Standard HJ 828-2017 "Water Quality — Determination of Chemical Oxygen Demand — Potassium Dichromate Method"
Measurement Range 10–5000 mg/L
Indication Error ≤ ±8% for concentrations < 100 mg/L; ≤ ±5% for concentrations ≥ 100 mg/L
Repeatability ≤ 5%
Measurement Cycle Minimum digestion time of 30 minutes; adjustable between 10–30 minutes based on actual water samples
Sampling Cycle Interval measurement (adjustable from 20–9999 minutes) or fixed-point measurement modes
Calibration / Verification Cycle Adjustable at any interval (1–99 days) and time
Maintenance Cycle ≥ 168 hours; each maintenance takes approximately 1 hour
Reagent Consumption < 0.5 yuan per sample
Output RS-232, 4–20 mA, RS-485
Environmental Requirements Temperature-controlled indoor environment (5–40 °C recommended); humidity 45–85%
Power Supply AC 220 ± 10% V, 50 ± 1% Hz, 5 A
Dimensions H1500 × W500 × D450 (mm)
Additional Features
  • Data retention during alarm or power failure.
  • Touchscreen display and command input.
  • Automatic residual reactant discharge and state recovery after power restoration or abnormal reset.
Key Features

Unique Design: This product features a distinctive design that ensures lower failure rates, reduced maintenance requirements, minimal reagent consumption, and higher cost-effectiveness compared to similar products.

  1. Selector Valve Assembly
    • Enables flexible reagent sampling timing and diverse channel configurations.
    • Minimizes dead volume for easy maintenance and extended service life.
  2. Micro-Dosing Unit
    • Utilizes a visual photoelectric system for precise reagent measurement, eliminating quantitative errors caused by peristaltic pump tube wear.
    • Achieves accurate micro-dosing with 0.7 mL per dose, significantly reducing reagent usage.
  3. Sample Introduction Unit
    • Employs a peristaltic pump with negative pressure suction, creating an air buffer zone between reagents and the pump tube to prevent corrosion.
    • Simplifies and enhances flexibility in reagent mixing.
  4. Sealed Digestion Unit
    • Operates under high-temperature and high-pressure conditions to accelerate reactions.
    • Eliminates corrosion risks from volatile gases in open systems.
  5. Reagent Tubing
    • Uses imported modified PTFE (polytetrafluoroethylene) transparent tubing with an inner diameter > 1.5 mm to minimize clogging by particulate matter in water samples.
Analytical Principle

The mixture of the water sample, potassium dichromate digestion solution, silver sulfate solution (added as a catalyst to enhance oxidation of linear aliphatic compounds), and concentrated sulfuric acid undergoes high-temperature digestion. During this process, the dichromate ions oxidize organic matter in the solution, causing a visible color change. The analyzer detects this colorimetric shift and converts it into a corresponding COD (Chemical Oxygen Demand) value for output.


Product Tags:

Dichromate Method CODcr Analyzer

      

RS-485 Output Chemical Oxygen Demand Analyzer

      

30min Measurement Period CODcr Analyzer

      
Quality Dichromate Method CODcr Analyzer Chemical Oxygen Demand Analyzer with RS-485 Output and 30min Measurement Period for Industrial Wastewater for sale

Dichromate Method CODcr Analyzer Chemical Oxygen Demand Analyzer with RS-485 Output and 30min Measurement Period for Industrial Wastewater Images

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