• Large, backlit graphic LCD display shows individual pH/mV/RmV result, dissolved oxygen in percent saturation or concentration results with temperature, or all results at once. Additional information includes electrode status, time, date, sample ID, user ID and calibration.
• For advanced users, features such as stability and averaging choices provide additional options.
• AUTO-READ™ locks in the stable reading, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals.
• Non-volatile memory holds up to 2000 data points with time and date stamp.
• Meter accepts and automatically recognizes Orion polarographic and RDO optical/luminescence-based probes.
• Up to 5 point pH calibration with automatic recognition for USA/NIST and DIN buffers and calibration editing to fix errors without a complete recalibration.
• Calibrate DO by using water-saturated air, air-saturated water, a Winkler titration or zero-point calibration.
• Automatic temperature, manual salinity and automatic/manual barometric pressure compensation.
• IP-54 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.
• Multilingual interface supports English, French, Spanish, Italian, German and Chinese.
• Mix samples without a stir plate or for faster BOD readings, meter can directly control the Orion Star stirrer or Orion AUTO-STIR™ DO probes (each sold separately).
• Inputs: (pH electrode) BNC, reference pin; (DO with temp. probe) 9-pin mini-DIN.
• Output: RS232, USB.
• Power: 100-240V AC adapter (included) or 4 x AA batteries (sold separately) for up to 800 hours of use.
• Warranty: 3 year meter replacement.

Specifications:
• pH range: -2.000 to 20.000 ±0.002.
• mV/RmV range: ±2000.0mV ±0.2mV or ±0.05% of reading, whichever is greater. EH ORP mode.
• Dissolved Oxygen range: (concentration – polarographic) 0.00 to 90.0mg/L ±0.2; (% saturation – polarographic) 0.0 to 600 ±2%; (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%.
• Dissolved oxygen: manual barometric pressure correction: 450.0 to 850.0mm Hg. Manual salinity factor correction: 0 to 45 ppt.
• Probe characteristics: Polarographic or RDO.