Thermo Scientific™ Orion Star™ A123 Dissolved Oxygen Portable Meter

Take simple dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion™ Star A123 DO Portable Meter with easy operation for basic field testing

Brand: Thermo Scientific™

Manufacturer Part Number: STARA1235

UNSPSC: 41115611

Code: 59

Additional Details:
Additional Details: Weight: 1.36080kg

Product Code. 11651449

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1 £ 1340.0 / Each
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Description and Specification


Resolution (Polarographic DO) 0.01, 0.1mg/L
Data Points 50
Percent Saturation Relative Accuracy (Polarographic DO) ±2 % saturation or ±2% of reading whichever is greater
Model Orion Star A123 Dissolved Oxygen/Temperature Portable Meter
Calibration Modes Water-saturated air, manual (Winkler titration)
Percent Saturation Resolution (Polarographic DO) 0.1, 1 % saturation
Stability Smart Stability and Smart Averaging
Log Function Type Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Resolution (Temperature) 0.1°C, 0.1°F
Dimensions (L x W x H) 24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)
Outputs None
Relative Humidity Range 5 to 85 %, non-condensing
Accuracy (Polarographic DO) ±0.2mg/L or ±2% of reading, whichever is greater
IP Rating IP-67
Temperature Selection Automatic with ATC temperature probe
Languages English
Measurement Modes Dissolved oxygen as % saturation or mg/L with temperature
Inputs 9 pin MiniDIN (polarographic DO sensor with built-in temperature)
Display Type LCD
Data Management Details Internal data point memory
Description Orion Star A123 dissolved oxygen portable meter kit with polarographic DO sensor, maintenance kit, meter armor and field case
Channels 1
Salinity Factor 0 to 45 ppt, automatic correction using manual entry of sample salinity
Weight (Metric) 0.5kg
Barometric Pressure Correction 450 to 850mmHg, automatic with manual entry
Pressure Range 450 to 850mmHg (manual entry)
AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Percent Saturation Range (Polarographic DO) 0.0 to 200.0 % saturation
Warranty 3 year meter warranty
Range (Polarographic DO) 0.00 to 20.00mg/L
Power Supply 4 AA batteries (included) or universal AC adapter (sold separately)
Battery Type Four AA (included)
Accuracy (Temperature) ±0.1°C
Sensor Types Polarographic dissolved oxygen sensor
Temperature (Metric) Operating 5° to 45° C (ambient)
Includes Star A123 DO meter, 083005MD Orion polarographic dissolved oxygen sensor, 080513 DO maintenance kit, protective meter armor, hard-sided field case, 4 AA batteries, literature CD, printed quick start guide and meter test certificate
Certifications/Compliance CE, TUV 3-1, FCC Class A
Probe Type Polarographic dissolved oxygen probe (includes 083005MD Orion polarographic DO sensor)
Memory Non-volatile memory preserves log and settings
Range (Temperature) 0.0 to 50.0 °C, 32.0 to 122.0 °F
Keypad Simple with highlighted measure key, scroll and shortcut keys
Battery Life 2000 hours
Temperature Probe Calibration 1 point temperature offset calibration

Thermo Scientific Orion Star A123 Dissolved Oxygen Portable Meters combine simplicity with accuracy. A large LCD displays dissolved oxygen readings along with temperature. Icons provide quick updates on battery life and completed calibration status. Simple button layout and onscreen messages help with calibration and setup menu choices.
  • Large, informative screen clearly shows the main information, including DO reading in mg/L or % saturation, temperature in °C or °F, meter mode and battery life
  • Automatic temperature, manual salinity input and manual barometric pressure compensation for an accurate result
  • Don't miss a reading – AUTOREAD™ locks in the stable reading on your screen and ready indicator alerts when readings are stable
  • Two calibration options to meet your procedural requirements: water-saturated air method or a Winkler titration
  • Accepts Thermo Scientific Orion polarographic dissolved oxygen probes
  • Non-volatile memory holds up to 50 data points
  • Four AA batteries (included) provide over 2000 hours of operation or purchase the universal power adapter (sold separately) to run meter on AC power
  • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing
  • Three year meter replacement warranty


Technical documents