• Large, backlit graphic LCD display shows dissolved oxygen in percent saturation or concentration, with temperature, electrode status, time, date and calibration points.
• Automatic temperature, manual salinity and automatic/manual barometric pressure compensation.
• AUTO-READ™ locks in the stable reading and ready indicator alerts when readings are stable.
• Calibrate using water-saturated air, air-saturated water, a Winkler titration or zero-point calibration.
• Non-volatile memory holds up to 1000 data points with time and date stamp.
• Meter accepts and automatically recognizes Orion polarographic and RDO optical/luminescence-based probes.
• Waterproof. IP67-rated housing.
• Multilingual interface supports English, French, Spanish, Italian, German and Chinese.
• Log function: manual, automatic with AUTO-READ™. Log edit: delete last reading or all.
• Input: DO with temperature probe: 9-pin mini-DIN.
• Output: RS232 or USB.
• Power: 4 x AA batteries (included) for over 800 hours of use or 100-240V with the AC adapter (sold separately).
• Warranty: 3 year meter replacement.

Specifications:
• DO: (concentration – polarographic) range: 0 to 90mg/L ±0.2. (% saturation – polarographic) range: 0 to 600 ±2%. (concentration – RDO) range: 0 to 50mg/L ±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, 10% of reading from 20 to 50mg/L. (% saturation – RDO) range: 0 to 500 ±2%.
• Temperature: range: 0.0 to 50.0ºC (32 to 122ºF) ±0.1º. Offset calibration: 1 point.
• Manual barometric pressure correction: 450.0 to 850.0mm Hg.
• Manual salinity factor correction: 0 to 45ppt.