The exquisite and compact design concept, save space for you.Clear and easy-to-read data interface, excellent anti-interference performance, calibrated point display, accurate measurement, convenient operation, combined with high-brightness backlighting, is your professional test tool, is a reliable instrument for daily measurement in laboratories and schools.
LH-D500 Portable Dissolved Oxygen Tester

Features:
Lightweight and easy to carry
HOLD auto lock
Salinity/stmospheric pressure compensation
IP65 waterproof grade
Multiple sets of measurement data
Simple operation
Applications:

| Project | Specifications | |
| Percent saturation | Measurement range | 0.0-200.0% |
| Resolution | 0.10% | |
| Indication error | 0.2%F.S | |
| Oxygen concentration | Measurement range | 0.00mg/L~20.00mg/L |
| Resolution | 0.01mg/L | |
| Indication error | 0.3mg/L | |
| Temperature | Measurement range | Compensate:0.0°C~50.0°C |
| Measuring:0.0°C~50.0°C | ||
| Resolution | 0.1 °C | |
| Indication error | 0.5°C | |
| Atmospheric pressure | Measurement range | 600mbar~1400mbar |
| Resolution | 1mbar | |
| Indication error | 1015mbar | |
| Salinity | Setting range | 0.0g/L~40.0g/L |
| Setting index | 0.1g/L | |
| Default value | 0.0g/L | |
| Power supply | Electric supply | 2 AAA batteries |
| Battery life | > 500 hours | |
| Use environment | Temperature and humidity | -5°C~60°C,Relative humidity<90% |