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| Key | Brand: Onset |
|---|---|
| Model | U26 |
| Sensor Type | Optical (Dynamic Fluorescence Quenching) |
| DO Range | 0–30 mg/L |
| Calibration Range | 0–20 mg/L |
| Accuracy | ±0.2 mg/L (0–8 mg/L), ±0.5 mg/L (8–20 mg/L) |
| Resolution | 0.02 mg/L |
| Response Time (t₉₀) | <2 min |
| Temperature Range | −5 to 40 °C |
| Temp Accuracy | ±0.2 °C |
| Temp Resolution | 0.02 °C |
| Memory | 64 KB (21,700 readings) |
| Logging Interval | 1 min – 18 hr |
| Battery Life | Up to 6 months typical |
| Depth Rating | ≤100 m |
| Dimensions | Ø3.96 cm × 26.67 cm |
| Weight | 464 g |
| Power | 3.6 V lithium battery |
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