For quick, accurate dissolved oxygen checks in laboratories, field and schools. Useful in aquaculture and aquariums.

• DO measure range: 0.00 to 90.00 mg/L or ppm
• Resolution and accuracy: 0.01 mg/L or ppm and ±0.2 mg/L
• % saturation of oxygen:  0.0 to 600.0%
• Resolution and accuracy: 0.1% and ± 2% 
• Temperature measure range: 0.0 to 50.0 °C (32 to 122 °F)
• Resolution and accuracy: 0.1 °C and ± 0.3 °C
• Salinity correction: 0.0 - 50.0 ppt
• Method: automatic correction after manual input
• Pressure correction: 450 to 825mmHg (59.9 to 109.9 kPa)
• Method: automatic correction with inbuilt sensor
• Calibration points: up to 2 points
• Memory: 500 data sets
• Probe type: galvanic
• Averaging/Stability
• Self-diagnostic
• Hold & Auto-Power Off after 2 - 30 minutes (user-preset)
• Power: 4 x 1.5 'AA' batteries (>400 hours) or 9V DC adapter, 500 mA
• Warranty: 36 months