OMEGA Engineering Benchtop Dissolved Oxygen Meter


Benchtop Dissolved Oxygen Meter

The DOB21 is a compact benchtop dissolved oxygen meter and a amperometric dissolved oxygen probe with automatic temperature compensation for field or laboratory applications. The unit measures dissolved oxygen in ppm or percent saturation and temperature in degrees Celsius. It features a RS232 output, auto calibration for all parameters, salinity and barometric pressure compensation, and data logging up to 99 points. Programming is conveniently done via a three button keypad and stored in the non-volatile memory. The unit also includes an audible minimum and maximum alarm. This product is ideal for testing biological samples, water and waste water, as well as aquariums. The DOB21 kit is supplied with the dissolved oxygen probe, a cell maintenance kit, BOD kit and operator’s manual all in a hard carrying case.
Benchtop Dissolved Oxygen Meter
Depth 135 mm
Height 170 mm
Width 130 mm
Power Requirements 9 Vdc battery (included)
Weight .45 kg
Additional Specifications Dissolved Oxygen
Measurement Range: 0 to 60 mgO2/L
Resolution Selection: 1/0.1/0.01
Relative Accuracy: 0.02% of full scale

Oxygen Gas
Measurement Range: 0 to 30% O2
Resolution Selection: 1/0.1
Relative Accuracy: 0.33% of full scale

% Saturation
Measurement Range: 0 to 600%
Resolution Selection: 1/0.1
Relative Accuracy: 0.1% of full scale

Automatic Temperature Compensation: 0 to 60°C (32 to 140°F)
Barometric Pressure Compensation Altitude: Up to 10,000 m (32,808')
Salinity Compensation: 0 to 40,000 ppm
Display: 16 characters x 2 lines
Operation Time: Up to 60 hours

Hard carrying case, oxygen probe, cell maintenance kit and BOD kit included.


  • Dissolved Oxygen / O2 / % Saturation / Temperature
  • Simple 3 key operation
  • Automatic Resolution Selection
  • Scale exchange in Auto-range
  • Continuous or Hold Readings
  • Non-Volatile Memory, even when turned off the program set up will be sustained
  • Automatic Calibration for all parameters
  • Automatic Temperature Compensation
  • Maximum and Minimum Sound Alarm
  • Battery charge Auto Monitoring
  • Dataloging up to 99 Readings
  • Salinity and Barometric Pressure Compensation
  • Clark Polarographic Cell
  • Automatic or Manual Zero and SPAN adjustment


  • DOB21
  • DOB21 Hard carrying case, oxygen probe, cell maintenance kit and BOD kit


Manuals and Resources

Note: We appreciate the support of individuals and companies making their documents and resources available to our community. If you find a document or resource that does not belong please let us know by emailing

Instrument Documents

Picture of OMEGA Engineering Benchtop Dissolved Oxygen Meter
Since its inception in 1962, OMEGA has grown from manufacturing a single product line of thermocouples to an established global leader in the technical...

More about OMEGA Engineering

Visit OMEGA Engineering

Questions and Answers

Recent Question Activity

Be the first to Ask a Question


Member Reviews

There are no threads in OMEGA Engineering Benchtop Dissolved Oxygen Meter Reviews at this time.
Add a Review