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Thermo Scientific™ Orion Star™ A213 Dissolved Oxygen Benchtop Meter

Reliably measure dissolved oxygen (RDO optical/polarographic) and temperature with this benchtop meter for advanced lab analysis.

$2120.00 - $3710.00


Measurement Modes Dissolved oxygen as % saturation or mg/L with temperature and barometric pressure
Sensor Types RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor
Range (Polarographic DO) 0.00 to 90.00mg/L
Percent Saturation Range (Polarographic DO) 0.0 to 600.0 % saturation
Resolution (Polarographic DO) 0.01, 0.1mg/L
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Products 3
Catalog Number Mfr. No. Description Includes Price Quantity & Availability  
Catalog Number Mfr. No. Description Includes Price Quantity & Availability  
Accessories View Documents
Thermo Scientific™
Orion Star A213 RDO/DO benchtop meter with stand Star A213 RDO/DO meter, electrode stand, universal power adapter, literature CD, printed quick start guide, computer interface cable and meter test certificate
Each for $2,120.00
Add to cart
Accessories View Documents
Thermo Scientific™
Orion Star A213 RDO/DO benchtop meter kit with polarographic DO sensor, maintenance kit and stand Universal AC adapter, 083005MD Orion polarographic DO sensor
Each for $3,270.00
Add to cart
Accessories View Documents
Thermo Scientific™
Orion Star A213 RDO/DO benchtop meter kit with Auto-Stir BOD probe, maintenance kit and stand Universal AC adapter, 086030MD Orion polarographic Auto-Stir BOD sensor
Each for $3,710.00
Add to cart


Record accurate and reliable dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion Star™ A213 Dissolved Oxygen and RDO Benchtop Meter. This instrument is ideal for a wide range of applications and advanced dissolved oxygen analysis in the lab. Use an RDO optical or polarographic DO probe for ultimate flexibility in sensors. Calibrate using water-saturated air, air-saturated water, custom value using Winkler titration or zero point options. Log up to 2000 data point sets with time/date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer.

Thermo Scientific Orion Star A213 dissolved oxygen benchtop meters are easy-to-use, dependable laboratory meters with advanced features and functions. Selectable read modes and stability indicator give you flexibility and control over your testing. All critical data is shown with your measurements including temperature, date and time, read type, measurement stability and active calibration information. Onscreen calibration and setup instructions can be displayed in several local languages with new languages added through software updates.
Navigation is fast and simple due to the comprehensive keypad with menu-specific function keys, dual purpose scroll/shortcut keys, plus power, measure, log view and stirrer keys that ensure easy operation. All setup menus are in one location with direct access using a single shortcut key so you can quickly access, evaluate and change measurement and instrument settings.

  • Measure dissolved oxygen in percent saturation or mg/L with temperature using Orion RDO optical DO probes or Orion polarographic DO probes
  • Calibrate dissolved oxygen using water-saturated air, air-saturated water, custom value (Winkler titration) and zero point options
  • Automatically compensate dissolved oxygen readings using ATC temperature, manual salinity input and built-in barometer for barometric pressure readings
  • Informative, easy-to-read backlit graphic display with clear onscreen instructions simplifies operation
  • Capture your critical readings with measurement stability indicator and selectable read modes — Auto-Read holds a stable reading, Continuous shows changing readings with hold option and Timed logs data at specific intervals
  • Eliminate the need for magnetic stir bars using the meter-controlled stirrer probe (catalog number 096019) or Orion Auto-Stir BOD probe (catalog number 086030MD) to uniformly mix solutions
  • Data log collects and date/time stamps up to 2000 measurement sets with optional sample ID and user ID
  • Calibration log stores 10 most recent calibrations
  • Non-volatile meter memory ensures your data and settings are protected, even with loss of power
  • Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
  • Flexible power options with universal power adapter or optional AA batteries
  • IP54-rated housing resists dust and splashes and can be wall-mounted if table space is limited
  • Meters include CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty

Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.



Dissolved oxygen as % saturation or mg/L with temperature and barometric pressure
0.00 to 90.00mg/L
0.01, 0.1mg/L
400 to 850mmHg
0.0°C to 50.0°C
1 point temperature offset calibration
Yes, selectable
2000 with date and time stamp
Transfer single, range or all data points to printer or computer
9 pin MiniDIN (RDO optical or polarographic DO sensor with built-in temperature), stirrer input (stirrer probe)
CE, TUV 3-1, FCC Class A
Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
0.9 kg
5 to 85 %, non-condensing
0.0 to 600.0 % saturation
English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
0.00 to 50.00mg/L
Orion Star A213 RDO Optical/Dissolved Oxygen/Temperature Benchtop Meter
±2 % saturation ≤ 200 % saturation, ±10 % saturation > 200 % saturation
0.0 to 500.0 % saturation
0.1, 1 % saturation
0.01, 0.1mg/L
Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
5°C to 45°C (ambient)
Four AA (sold separately)
RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor
0.0 to 600.0 % saturation
±0.2mg/L or ±2% of reading, whichever is greater
Water-saturated air, air-saturated water, manual (Winkler titration), zero point
0.1°C (0.1°F)
Automatic with ATC temperature probe
Graphic LCD with Backlight
Non-volatile memory preserves data log, calibration log and meter settings
Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
High/low limit alarm, calibration due alarm
USB, RS232
24 cm x 18 cm x 11 cm (9.5 in. x 7.1 in. x 4.3 in.)
2 lb.
3 Year Meter Warranty
Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, ±10% of reading up to 50mg/L
10 per channel with password protection
400 to 850mmHg, automatic using built-in barometer or manual entry
0.1, 1 % saturation
±2 % saturation or ±2% of reading whichever is greater
Universal AC adapter (included) or 4 AA batteries (sold separately)
0.0 to 45.0 ppt, automatic correction using manual entry of sample salinity
41°F to 113°F (ambient)
800 hours
Product Certifications
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