Chromium Online Water Quality Analyzer 0-5mg/L AC220V
Chromium Online Water Quality Analyzer
>>Overview
>>Principle
The product employs the diphenylcarbazide spectrophotometric method for total chromium detection. After mixing the water sample with a strong oxidizing agent, trivalent chromium (Cr³⁺) is oxidized to hexavalent chromium (Cr⁶⁺). In an acidic environment with an indicator present, Cr⁶⁺ reacts with the indicator to form a colored complex. The monitor detects this color intensity change, converts it into total chromium concentration values, and outputs the results. The amount of colored complex generated corresponds to the total chromium concentration.
>>Technical Parameter
| Test Method |
Diphenylcarbazide Spectrophotometric Method |
| Measuring Range |
0~5mg/L (segmented measurement, expandable) |
| Detection Limit |
≤0.02mg/L |
| Resolution |
0.001mg/L |
| Accuracy |
±5% |
| Repeatability |
≤±5% |
|
Drift (24h) |
Zero drift: ±5% Span drift: ±10% |
| 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 |
|
| 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) |
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