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| Brand | AOE |
|---|---|
| Origin | Shanghai, China |
| Model | WA650 |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Photometric Accuracy (Transmittance) | <0.5% T |
| Photometric Repeatability (Transmittance) | <0.2% T |
| Stray Light | <0.05% T |
| Optical Stability | ±0.002 A/h |
| Measured Parameters | Total Nitrogen (TN), Total Phosphorus (TP), Ammonia-Nitrogen (NH₃-N), Chemical Oxygen Demand (COD) |
| Measurement Ranges | TN: 2–15,000 mg/L |
| TP | 1–10 mg/L |
| NH₃-N | 0.01–30 mg/L |
| COD | 0.02–100 mg/L |
| Measurement Time | TN: 50 min |
| TP | 40 min |
| NH₃-N | 15 min |
| COD | 20 min |
| Measurement Error | TN: <±8% |
| TP | <±5% |
| NH₃-N | <±5% |
| COD | <±5% |
| Batch Capacity | TN/TP/COD: up to 16 samples (expandable) |
| NH₃-N | up to 20 samples (expandable) |
| Digestion Temperature Control | TN: 122°C ±0.5°C |
| TP | 120°C ±0.5°C |
| COD | 165°C ±0.5°C |
| Digestion Time | TN: 40 min |
| TP | 30 min |
| NH₃-N | 10 min |
| COD | 10 min |
| Digestion Mode | Sealed for TN & TP |
| Preloaded Calibration Curves | 200 sets |
| Data Storage Capacity | 40,000 test records |
| Standard Accessories | Reagent kits, 16-position intelligent digester, optional cuvettes (1 cm / 2 cm / 3 cm) |
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