Online COD Analyzer CODmn Water Quality Monitor Permanganate Index Analyzer

This method is applicable to wastewater with a permanganate index in the range of 0-20 mg/L.

1. Measurement Method: Potassium permanganate oxidation spectrophotometry
2. Measurement Range: 0-20 mg/L
3. Accuracy: ≤ ±10%
4. Repeatability: ≤ ±5%
5. Measurement Cycle: Minimum digestion time 20 minutes, adjustable between 5-120 minutes according to actual water samples.
6. Sampling Cycle: Interval measurement (adjustable from 20-9999 minutes) and hourly measurement modes.
7. Calibration Cycle: Adjustable at any interval from 1-99 days.
8. Maintenance Cycle: Typically once per month, approximately 30 minutes each time.
9. Reagent Consumption: < ¥0.5 per sample.
10. Output: RS-232, 4-20mA, RS-485.
11. Environmental Requirements: Temperature-controlled indoor environment (recommended +5-28°C); Humidity ≤90% (non-condensing).
12. Power Supply: AC220V±10%, 50Hz±10%, 5A.
13. Dimensions: 1500mm(H) × 550mm(W) × 450mm(D).
14. Additional Features:

• Data retention during abnormal alarms and power outages
• Touchscreen display and command input
• Automatic discharge of residual reactants and resumption of operation after abnormal reset or power restoration.

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.