• Simultaneous display of pH, dissolved oxygen and temperature on the backlit LCD
  
• Uses optical DO technology
  
• No membranes to change - once-a-year cap replacement
  
• Calibrate for dissolved oxygen using water-saturated air, air-saturated water, zero point or a custom point with Winkler titration
  
• Built-in barometer for automatic pressure correction for dissolved oxygen readings with option for manual correction
  
• pH calibration of up to 5 points with calibration alarm and automatic buffer recognition of USA, NIST and DIN buffers
  
• Temperature calibration capability
  
• Data storage for 750 data sets with time and date stamping
  
• RS232 port for easy data downloading and software updates
  
• IP67-rated meter housing and IP68-rated RDO sensor
  
• Four AA batteries provide over 1000 hours of operation in AUTO-READ™ mode
  
• 3-year warranty on meter and RDO sensor body
  
• 1-year warranty on optical cap
  

0.00 to 20.0 mg/L

0.01, 0.1 mg/L

±0.1 mg/L up to 8 mg/L; ±0.2 mg/L from 8 to 20 mg/L

0.0 to 200%

0.1, 1%

± 2%

450 to 850 mm Hg, automatic or manual

Water saturated air, air saturated water, manual (Winkler) and zero point

RDO optical

-2.000 to 19.999

0.1, 0.01, 0.001

± 0.002

± 1999.9 mV

0.1 mV

± 0.2 mV or 0.05% of reading, whichever is greater

Temperature (with RDO sensor)

0 to 50 °C

0.1 °C

± 0.3 °C

Temperature (when RDO sensor is not used)

-5 to 105 °C

0.1 up to 99.9 °C, 1.0 over 99.9 °C

±0.1 °C