• Measure dissolved oxygen and temperature simultaneously using YSI’s polarographic technology for oxygen and YSI Temperature Precision® thermistors.
• Waterproof with a rugged impact resistant case.
• Field replaceable DO electrode modules.
• Automatic temperature, salinity (0-70 ppt), and altitude compensations for DO readings.
• Expanded DO and salinity ranges for a wider application range.
• Calibrate in either mg/L or % saturation.
• User selectable temperature (°C or °F).
• Fast and easy measurements with one-hand operation.
• Automatic push button calibration.
• Built-in calibration chamber.
• Weighted, quick-sinking probe with 12-foot cable.
• Screw-on cap membranes.
• Low battery indicator and large, backlit display.
• Dimensions: 4.7”W x 9”L.
• Power: 4 alkaline C-cells (>2000 hours at 25°C).
• Warranty: 3 year (meter), 1 year (DO module and cable).

Specifications:
Dissolved Oxygen, ppm
Ranges: 0-50 mg/L
Resolution: 0.01 or 0.1 mg/L
Accuracy: 0-20 mg/L;
±0.3 mg/L or ±2% of reading, whichever is greater.
20-50 mg/L; ±6% of reading
Dissolved Oxygen, % Saturation:
Ranges: 0-500%
Resolution: 0.1% or 1%
Accuracy: 0-200%; ±2% air saturation or ±2% of reading,
whichever is greater. 200-500%; ±6% of reading
Temperature:
Ranges: -5°C to +45°C
Resolution: 0.1°C
Accuracy: ±0.3°C