DO-P820/821 are one of the most popular portable DO meters. The DO-P820 dissolved oxygen meter is less expensive and less accurate than the P821, making it suitable for use in aquaculture.
The P821 not only has high accuracy and supports storage of 500 sets of data but also has added limit value protection. Exceeding the high and low limit values will be alarmed to remind. If there are other concerns besides the above differences when purchasing a dissolved oxygen meter, you can choose the affordable P820.
Portable Dissolved Oxygen Meter Specifications:
| 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 |
Portable Dissolved Oxygen Meter Features:
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
Details of Portable DO Meter (DO-P820):
This portable do meter has advanced features and functionality and is manufactured with a high quality electrochemical sensor. Great for experimental research, schooling and use in aquaculture, swimming pools and more.
All components include the main DO meter, sensor probe, calibration fluid, power adapter and user manual. Each component is placed in a foam pad to prevent damage during shipping. The box is portable and ideal for laboratory and field testing.
WHY SCITEK
3 Year Limited Warranty
1-2 Days Handling and 7-30 Days Shipping
CE and FDA European Standards
English
