Nanjing Juge Environmental Technology Co., Ltd.
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Hexavalent Chromium Online Water Quality Analyzer
>>Overview
>>Principle
The product utilizes the diphenylcarbazide spectrophotometric method for hexavalent chromium detection. After mixing the water sample with conditioning agents, Cr⁶⁺ reacts with the indicator in an acidic environment to form a colored complex. The monitor detects the color intensity change at specific wavelengths, converts it into Cr⁶⁺ concentration values, and outputs the results. The amount of colored complex generated is proportional to the hexavalent 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 |
±10% |
| Repeatability |
≤±5% |
|
Drift (24h) |
Zero drift: ±5% Span drift: ±10% |
| Measurement Time |
<20min (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) |