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Thermo Scientific™ Orion Star™ A113 Dissolved Oxygen Benchtop Meter

Take simple dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion™ Star A113 DO Benchtop Meter with easy operation for basic lab testing

Manufacturer:  Thermo Scientific™ ORISTARA1135

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Catalog No. 13-645-515



Take simple, routine dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion™ Star A113 Dissolved Oxygen Benchtop Meter, an easy-to-use and budget-friendly instrument for basic dissolved oxygen analysis in the lab. Calibrate polarographic DO probes using water-saturated air or custom value using Winkler titration. Quickly navigate setup menus and ensure consistent calibrations using the simple keypad layout and on-screen text prompts. Use the included electrode stand to easily place sensors in samples and simplify storage.

Thermo Scientific Orion Star A113 Dissolved Oxygen Benchtop Meters combine simplicity with accuracy. Icons provide quick updates on battery life and completed calibration status. Simple button layout and onscreen messages help with calibration and setup menu choices.

Features and Benefits

  • Large, informative screen clearly shows the main information, including DO reading in mg/L or % saturation, temperature, meter mode and power source
  • 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 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
  • Plug the meter into almost any power outlet with the included universal power adapter, or use four AA batteries (sold separately)
  • The IP54-rated housing can handle splashes and can be wall-mounted if table space is a problem
  • 3 year meter replacement warranty


5 to 85 %, non-condensing
2 lb.
24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
41° to 113°F (ambient)
Orion Star A113 dissolved oxygen benchtop meter kit with polarographic DO sensor, maintenance kit and stand
Star A113 DO meter, 083005MD Orion polarographic dissolved oxygen sensor, 080513 DO maintenance kit, electrode stand, universal power adapter, literature CD, printed quick start guide and meter test certificate
0.01, 0.1mg/L
0.0 to 200.0 % saturation
±2 % saturation or ±2% of reading whichever is greater
450 to 850mmHg, automatic with manual entry
0 to 45 ppt, automatic correction using manual entry of sample salinity
0.0 to 50.0 °C, 32.0 to 122.0 °F
1 point temperature offset calibration
Dissolved oxygen as % saturation or mg/L with temperature
Internal data point memory
Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Universal AC adapter (included) or 4 AA batteries (sold separately)
Four AA (sold separately)
3 year meter warranty
CE, TUV 3-1, FCC Class A
5° to 45° C (ambient)
Orion Star A113 Dissolved Oxygen/Temperature Benchtop Meter
0.00 to 20.00mg/L
±0.2mg/L or ±2% of reading, whichever is greater
0.1, 1 % saturation
Polarographic dissolved oxygen sensor
450 to 850mmHg (manual entry)
Water-saturated air, manual (Winkler titration)
0.1°C, 0.1°F
Automatic with ATC temperature probe
Simple with highlighted measure key, scroll and shortcut keys
Smart Stability and Smart Averaging
Non-volatile memory preserves log and settings
9 pin MiniDIN (polarographic DO sensor with built-in temperature)
Polarographic dissolved oxygen probe (includes 083005MD Orion polarographic DO sensor)
Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
2000 hours