The microprocessor-based Tabletop Dissolved Oxygen Meter EZL-TDO121 measures dissolved oxygen in mg/L, ppm, or % saturation and has a water-resistant membrane keypad and a simultaneous temperature display. The full-featured instrument has one-button auto calibration, a temperature measurement range of 0 °C to 100 °C, and a DO accuracy of only ± 0.3 %. It also has automatic pressure compensation of 80 kPa to 105 kPa and temperature compensation of 0 °C to 100 °C, which can improve measurement precision.
| Parameters | Concentration, Saturation, Temperature |
| DO Range | 0.00 to 20 mg/L (ppm) |
| Resolution | 0.01/0.1 |
| DO Accuracy | ± 0.3 % |
| DO Saturation | 0.0 to 200 % |
| Saturation Resolution | 0.001 |
| Saturation Accuracy | ± 2.0 % FS |
| Temperature Measuring Range | 0 °C to 100 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ± 0.1 °C |
| Temperature Compensation Range | 0 °C to 100 °C ( Automatic) |
| Salinity Compensation Range | 0.0 to 50.0 g/L |
| Pressure Compensation Range | 80 kPa to 105 kPa (Automatic) |
| Pressure Resolution | 1 |
| Pressure Accuracy | ± 2 % |
| Stability | ± 0.07 mg/L/1h |
| Response Time | ≤ 30 s (25 °C, 90 % Response) |
It is a specialized instrument that is used to test the oxygen content of solutions in: boiler feed water, condensate water and environmental protection sewage, and other industries.
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