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| Brand | DoctorWater |
|---|---|
| Origin | Hunan, China |
| Model | Dr-W121 |
| Instrument Type | Portable |
| Wavelength Range | 330–900 nm |
| Wavelength Accuracy | ±5 nm |
| Photometric Accuracy | ≤±5% |
| Repeatability | ≤±2% |
| Absorbance Resolution | 0.001 Abs |
| Optical Stability | ≤±0.005 Abs/20 min |
| Detector System | Automatic Wavelength Positioning Optical Detection System |
| Display | 5-inch HD Color Touchscreen |
| Sample Format | 16 mm & 25 mm Cuvettes |
| Light Source | Imported Cold LED (Lifespan >100,000 h) |
| Power Supply | Rechargeable Li-ion Battery + AC Adapter |
| Data Storage Capacity | 1,000,000 Measurements |
| Connectivity | USB Type-C (Charging & Data Transfer) |
| Calibration Modes | Blank, Factor, and Calibration Curve |
| Readout Units | Concentration (mg/L) or Absorbance (Abs) |
| Housing Material | Corrosion-Resistant ABS |
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