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| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Measurement Principle | Coulometric Titration with Acidic Potassium Permanganate Oxidation |
| Range | 0–20 / 40 / 100 / 200 / 400 / 1000 mg/L as O₂ |
| Repeatability | ±2% RSD |
| Accuracy | ±5% of reading |
| LOD | 0.4 mg/L |
| Resolution | 0.01 mg/L |
| Single-Test Duration | 5–10 min |
| Data Storage | 100 test records |
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Measurement Principle | Potassium Permanganate Oxidation with ORP Endpoint Detection |
| Range | 0–20 mg/L and 0–2000 mg/L |
| Repeatability | ±1% FS (0–20 mg/L), ±2% FS (20–200 mg/L), ±5% FS (>200 mg/L) |
| Resolution | 0.01 mg/L |
| Single-Test Duration | 60 minutes |
| Display | LCD |
| Stability | Zero Drift ±3% FS |
| Operating Environment | Indoor installation |
| Sample Temp. | 5–40°C, Ambient Pressure |
| Sample Volume per Test | 500 mL |
| Analog Output | 4–20 mA (max. load 600 Ω) |
| Power Supply | 220 VAC, 50/60 Hz |
| Power Consumption | Max. 550 VA, Avg. 200 VA |
| Dimensions | 600 × 600 × 1600 mm |
| Weight | 150 kg |
| Data Storage | 14-day onboard logging |
| Optional Accessories | Thermal printer interface |
| Maintenance Frequency | Low (automated line flushing, air-jet nozzle for titration tip) |
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