>>Application
This method is applicable to wastewater with a permanganate index in the range of 0-20 mg/L.
>>Technical parameters
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.
>>Feature
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.
-
Selector Valve Assembly:
- Enables flexible reagent sampling timing and diverse channel configurations.
- Minimizes dead volume for easy maintenance and extended service life.
-
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.
-
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.
-
Sealed Digestion Unit:
- Operates under high-temperature and high-pressure conditions to accelerate reactions.
- Eliminates corrosion risks from volatile gases in open systems.
-
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 water sample is mixed with potassium permanganate digestion solution and dilute sulfuric acid solution, then heated for digestion. After permanganate ions oxidize organic matter in the solution, the mixture undergoes a color change. The analyzer detects this chromatic variation and converts it into a permanganate index value for output.
