Description
Product introduction
Portable Dissolved Oxygen Meter
Professional portable dissolved oxygen meter, 2 points calibration, selectable the salinity and barometric pressure coefficients, accuracy: 0.2 mg/L.
Features
• Professional portable dissolved oxygen meter is equipped with a backlit LCD display.
• 1 or 2 points calibration using the air-saturated water or zero oxygen solution.
• Salinity and barometric pressure compensations eliminate the measurement error.
• Automatic temperature compensation ensures accurate readings over the entire range.
• Auto-Read function senses and locks the measurement endpoint.
• Calibration due alarm prompts user to calibrate the meter regularly.
• Auto-Power Off effectively conserves battery life.
• Setup menu allows setting the number of calibration points, resolution, stability criteria, date
and time, etc.
• Reset function automatically resumes all settings back to the factory defaults.
• Expanded memory stores or recalls up to 500 data sets.
• USB communication interface is easy to transfer data to PC.
• Multi-mode power scheme (batteries, power adapter and USB port) ensures that using the
meter smoothly.
Applications:
• Research and education
• Environmental monitoring
• Other industrial applications
Specification
| Model | LH-821 |
| Dissolved Oxygen | |
| Range | 0.00 to 20.00 mg/L |
| Resolution | 0.01 / 0.1 mg/L, selectable |
| Accuracy | ±0.2 mg/L |
| % Saturation of Oxygen | |
| Range | 0.0 to 200.0% |
| Resolution | 0.1 / 1%, selectable |
| Accuracy | ±2.0% |
| Other Specifications | |
| Calibration Points | 1 or 2 points |
| Temperature Compensation | 0 to 50°C / 32 to 122°F, automatic |
| Pressure Correction | 60.0 to 112.5 kPa / 450 to 850 mmHg, manual |
| Salinity Correction | 0.0 to 50.0 ppt, manual |
| Temperature Correction | Reading ±10°C/°F |
| Hold Function | Manual / Auto-read measurement endpoint |
| Stability Criteria | Low / High |
| Calibration Due Alarm | 1 to 31 days or off |
| Auto-Power Off | 10 / 20 / 30 minutes after last key pressed |
| Memory | Stores up to 500 data sets |
| Output | USB communication interface |
| Connector | 6-pin mini-DIN |
| Display | Custom LCD (80 × 60 mm) |
| Power Supply | 3 × 1.5V AA batteries or 5V DC power adapter |
| Battery Life | Approximately 150 hours without backlight |
| Environmental Conditions | 0 to 50°C / 32 to 122°F, relative humidity < 80% |
| Dimensions | 170 × 85 × 30 mm |
| Weight | 300 g |
