SKU: PDO-821
Azzota® High-accuracy Portable Dissolved Oxygen Meter (2020 Model)
Azzota® High-accuracy Portable Dissolved Oxygen Meter (2020 Model) Azzota® High-accuracy Portable Dissolved Oxygen Meter (2020 Model)

Professional portable dissolved oxygen meter, 2 points calibration, selectable the salinity and barometric pressure coefficients, accuracy: 0.2mg/L.


  • The professional portable dissolved oxygen meter is equipped with a backlit LCD display.
  • 1 or 2 points calibration using the air-saturated water or zero oxygen solution.
  • Salinity and barometric pressure compensations eliminate the measurement error.
  • Automatic temperature compensation ensures accurate readings over the entire range.
  • Calibration due alarm prompts the user to calibrate the meter regularly.
  • Auto-Read function senses and locks the measurement endpoint.
  • Auto-Power Off effectively conserves battery life.
  • Setup menu allows setting the number of calibration points, resolution, stability criteria, date and time, etc.
  • Reset function automatically resumes all settings back to the factory defaults.
  • Expanded memory stores or recalls up to 500 data sets.
  • USB communication interface is easy to transfer data to the PC.
  • A multi-mode power scheme (batteries, power adapter, and USB port) ensures that using the meter smoothly.

Packing list

  1. PDO-821 meter
  2. DO100 dissolved oxygen electrode
  3. DO electrolyte solution
  4. DO membrane cap
  5. Carrying case




   Dissolved Oxygen






0.01, 0.1mg/L, selectable

   % Saturation of Oxygen






0.1, 1%, selectable


   Calibration Points

1 or 2 points

   Temperature Compensation

0~50°C, 32~122°F, automatic

   Pressure Correction

60.0~112.5kPa, 450~850mmHg, manual

   Salinity Correction

0~50g/L, manual

   Stability Criteria

Low or high

   Calibration Due Alarm

1 to 31 days or off


Stores up to 500 data sets


USB communication interface


6-pin DIN


3.5" custom LCD


3×1.5V AA batteries or DC5V power adapter

   Battery Life

Approximately 150 hours (Turn off the backlit)




11 oz