• Large, backlit graphic LCD display shows dissolved oxygen in percent saturation or concentration and temperature along with time, date, sample ID, user ID and calibration information.
• AUTO-READ™ locks in the stable reading, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals.
• For advanced users, features such as stability and averaging choices provide additional options.
• No need to worry about DO probe compatibility – the meter accepts and automatically recognizes Orion polarographic and RDO optical/luminescence-based probes.
• Automatic temperature, manual salinity and your choice of automatic or manual barometric pressure compensation.
• Calibrate using water-saturated air, air-saturated water, a Winkler titration or zero-point calibration.
• Non-volatile memory holds up to 2000 data points with time and date stamp.
• Multilingual interface that supports English, French, Spanish, Italian, German, and Chinese.
• For faster BOD readings, control the Orion AUTO-STIR™ polarographic DO probe directly from the meter.
• IP54-rated housing handles splashes and is wall-mountable.
• Log function: manual, ready (includes AUTO-READ™), timed. Log edit: delete individual points, group of points or all.
• Inputs: 9-pin mini-DIN (DO with temperature probe). Output: RS232 and USB.
• Power: 100-240V (AC adapter included) or 4 x AA batteries (sold separately). Batteries provide up to 800 hours of use.
• Warranty: 3 year meter replacement.

Specifications:
• Temperature range: 0.0 to 50.0ºC (32 to 122ºF) ±0.1. Offset calibration: 1 point.
• DO: (concentration – polarographic) 0.00 to 90.0mg/L ±0.2; (% saturation – polarographic) 0.0 to 600 ±2%;
• RDO: (concentration – RDO) 0.00 to 50.0mg/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) 0.0 to 500 ±2%.
• Automatic barometric pressure correction: 450.0 to 850.0mm Hg.
• Manual salinity factor correction: 0 to 45 ppt.
• Probe characteristics: polarographic or RDO.