| Customization: | Available |
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| After-sales Service: | 24-hour online service,free accessories |
| Warranty: | 2 years |
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The following are the common features of the two:
Automatic temperature compensation to ensure accurate measurements over the full range.
Automatic endpoint lock, retains stable readings for easy viewing and recording.
1or 2 point calibration, using air-saturated water or zero-oxygen solution.
Salinity and atmospheric pressure compensation to eliminate measurement errors.
USB interface for easy data transfer
| Model | DO-P820 | DO-P821 | |
| DO | Range | 0.00~20.00mg/L, 0.0~200.0% saturation | 0.00~20.00mg/L, 0.0~200.0% saturation |
| Resolution | 0.01mg/L, 0.1% | 0.01mg/L, 0.1% | |
| Accuracy | ±0.5mg/L,±20% | ±0.2mgL,±2.0% | |
| Other Specifications | Calibration Points | 1 or 2 points | 1 or 2 points |
| Temperature Compensation | 0~50°C/32~122°F, automatic | 0~50°C/32~122°F, automatic | |
| Barometric Pressure Correction | 60.0~112.5kPa/450~850mmHg, manual | 60.0~112.5kPa/450~850mmHg, manual | |
| Salinity Correction | 0.0~50.0g/L, manual | 0.0~50.0g/L, manual | |
| Stability Criteria | - | Low or high | |
| Calibration Due Alarm | - | 1 to 31 days or off | |
| Hold Function | Manual a auto endpoint | Manual or auto-endpoint | |
| Auto-Off | 30 minutes after last key pressed | 10,20 or 30 minutes after last key pressed | |
| Memory | 100 data sets | 500 data sets | |
| Communication Interface | USB | USB | |
| Connector | 6-pin mini-DIN | 6-pin mini-DIN | |
| Display | Custom LCD (80×60mm) | Custom LCD (80×60mm) | |
| Power Requirements | 3×1.5V AA batteries or DC5V power adapter | 3×1.5V AA batteries or DC5V power adapter | |
| Sizes(W×D×H) | 170×85×30 | ||
| Shipping Size (W×D×H)(mm) | 350x100x300 | ||
| N.W./G.W. (kg) | 0.3/1.5 | ||
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