Orion Star A123 Dissolved Oxygen Portable Meter

  • Low Range DO Applications Dissolved oxygen measurement range from 0 to 20 mg/L
  • Non-Volatile Memory Memory capacity to store up up 50 time and date stamped data points
  • Warranty A123 dissolved oxygen meter is covered by a 3 year replacement meter warranty
Product Options


The Orion Star A123 Handheld Dissolved Oxygen Meter is waterproof and portable, it can be powered either by four AA batteries which give over 2000 hours of operation or with a universal power adapter which is sold separately to run on AC power. Icons give quick updates on battery life and completed calibration status plus, the easy to use button layout and onscreen messages help setup menu choices and calibration.

The Orion Star A123 Handheld Dissolved Oxygen Meter has two calibration options to meet procedural requirements: water-saturated air method or a Winkler titration. Automatic temperature, manual salinity input and manual barometric pressure compensation for an accurate result.

Dissolved oxygen readings will not be missed because of the AUTO-READ™system which locks in the stable reading on the screen and ready indicator alerts when readings are stable. It can be used anywhere with its IP67-rated housing and accepts Orion polarographic dissolved oxygen probes, and also has the advantage of holding up to 50 data points make it the ideal choice for dissolved oxygen readings.

This product is covered by a 3 year meter replacement warranty.

Manufactured by: Thermo Scientific
Model: Orion Star A123 Dissolved Oxygen Portable Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Low range dissolved oxygen measurement
River monitoring


Dissolved Oxygen -
Range 0 to 20 mg/L
Resolution 0.01, 0.1
Relative Accuracy ±0.2
% Saturation
Range 0 to 200
Resolution 0.1, 1
Relative Accuracy ±2 %
Manual Barometric Pressure Correction 450.0 to 850.0 mm Hg
Manual Salinity Factor Calibration 0 to 45
Calibration Features Water-saturated air, manual (Winkler)
Sensor Type Polarographic
Range 0 to 50 °C, 32 to 122 °F
Resolution 0.1
Relative Accuracy 0.1
Temperature Offset Calibration Yes
Number of Points 50
Log Function Manual, Automatic with AUTO-READ™
Log Edit Delete last reading or all
DO with Demperature Probe 9-pin mini-DIN
AC Adapter Optional - universal, 100-240VAC
Battery Power Included 4 AAs
Battery Life 2000 hrs


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