Product Overview:
CODMn refers to the mass concentration of oxygen corresponding to the oxidant consumed when strong oxidizing agents are used to oxidize organic matter and inorganic reducing substances in water samples under specific conditions. CODMn is an important indicator reflecting the degree of pollution caused by organic matter and inorganic reducing substances in water bodies.This analyzer can operate automatically and continuously without manual intervention based on on-site settings, making it widely suitable for applications such as surface water monitoring. Depending on the complexity of the on-site testing conditions, a corresponding pre-treatment system can be optionally configured to ensure reliable testing processes and accurate results, fully meeting the needs of various field scenarios.
Product Principle:
The permanganate method for COD uses permanganate as an oxidizing agent. The sample is heated in a water bath for 20 minutes, and the amount of potassium permanganate consumed in decomposing organic matter in the wastewater serves as an indicator of the pollutant level in the water.
Technical Parameters:
|
No. |
Specification Name |
Technical Specification Parameter |
|
1 |
Test Method |
Potassium Permanganate Oxidation Spectrophotometry |
|
2 |
Measuring Range |
0~20mg/L (Segment measurement, expandable) |
|
3 |
Lower Detection Limit |
0.05 |
|
4 |
Resolution |
0.001 |
|
5 |
Accuracy |
±5% or 0.2mg/L, whichever is greater |
|
6 |
Repeatability |
5% |
|
7 |
Zero Drift |
±0.05mg/L |
|
8 |
Span Drift |
±2% |
|
9 |
Measurement Cycle |
Minimum testing cycle 20min; Digestion time adjustable from 5~120min based on actual water sample |
|
10 |
Sampling Cycle |
Time interval (adjustable), on-the-hour, or triggered measurement mode, configurable |
|
11 |
Calibration Cycle |
Automatic calibration (1~99 days adjustable); Manual calibration configurable based on actual water sample |
|
12 |
Maintenance Cycle |
Maintenance interval >1 month; each session approx. 30min |
|
13 |
Human-Machine Operation |
Touchscreen display and command input |
|
14 |
Self-check & Protection |
Self-diagnosis of instrument status; data retention after abnormality or power failure; automatic clearing of residual reactants and resumption of operation after abnormal reset or power restoration |
|
15 |
Data Storage |
5-year data storage capacity |
|
16 |
Input Interface |
Digital input (Switch) |
|
17 |
Output Interface |
1x RS232 output, 1x RS485 output, 2x 4~20mA analog outputs |
|
18 |
Operating Environment |
Indoor use; recommended temperature 5~28°C; humidity ≤90% (non-condensing) |
|
19 |
Power Supply |
AC220±10% V |
|
20 |
Frequency |
50±0.5 Hz |
|
21 |
Power Consumption |
≤150W (excluding sampling pump) |
|
22 |
Dimensions |
520mm (H) x 370mm (W) x 265mm (D) |
