| Measurement item | Dissolved oxygen | pH | Nitrite | Ammonia nitrogen |
| Measuring range | 0~30mg/L | 3.5~11.0 | 0~1.00m/L | 0~1.00mg/L |
| Resolution | 0.1mg/L | 0.1 | 0.01 | 0.01 |
| Accuracy | ±3.0% FS | ±0.2 | ±5% or 0.01mg/L | ±5% or 0.01mg/L |
| Dissolved oxygen correction | 100% saturated dissolved oxygen correction in air | |||
| Temperature measurement range | 0.0~50℃ | |||
| Temperature accuracy | ±0.5℃ | |||
| °C/°F switching | √ | |||
| Data recording | Manually record 99 groups | |||
| Salinity compensation | 0~42ppt | |||
| Altitude compensation | 0~3500m | |||
| Auto power-off | Shutdown after 1 hour without operation | |||
| Screen size | 27*45mm | |||
| Backlit display | √ | |||
| Automatic temperature compensated |
√ | |||
| Low battery indication | √ | |||
| Probe wire length | About 3.5 meter (included probe) | |||
| Power supply | 4×1.5V (AAA) battery | |||
| Product net weight | 132g | |||
| Product size | 70x28x162mm | |||
| Quantity of carton | 5（PCS） | |||
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