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| Brand | Onset HOBO |
|---|---|
| Origin | USA |
| Model | U20-001-01 / U20-001-02 / U20-001-03 / U20-001-04 |
| Measurement Principle | Absolute pressure-based hydrostatic water level sensing with integrated temperature compensation |
| Temperature Range | -20 to 50 °C |
| Temp Accuracy | ±0.37 °C @ 20 °C, ±0.5 °C outside -5 to 40 °C |
| Temp Resolution | 0.1 °C @ 20 °C |
| Water Level Ranges | 0–4 m (U20-001-04), 0–9 m (U20-001-01), 0–30 m (U20-001-02), 0–76 m (U20-001-03) |
| Water Level Accuracy | ±0.3 cm (U20-001-04), ±0.5 cm (U20-001-01), ±1.5 cm (U20-001-02), ±3.8 cm (U20-001-03) |
| Water Level Resolution | 0.14–0.87 cm (model-dependent) |
| Dimensions | 150 mm × 24.6 mm |
| Weight | 7 g |
| Memory Capacity | 21,000 measurements |
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