A213 Dissolved Oxygen Benchtop Meter

  • Warranty This product comes complete with a three year warranty
  • AUTO-READ Stable readings are locked on screen
  • User Friendly Plain Language screen prompts
Product Options


The Orion Star™ A213 Dissolved Oxygen Benchtop Meter features a large backlit LCD which displays dissolved oxygen in percent saturation or concentration and temperature along with time, date, sample ID, user ID and calibration information. Accurate results are easy with automatic temperature, manual salinity and choice of automatic or manual barometric pressure compensation. The A213 is automatically recognizes and accepts the Orion™ polarographic and RDO optical/luminescence-based probes eliminating any concerns regarding barometric pressure compensation. Calibration is carried out using water-saturated air, air saturated water, a winkler titration or zero point calibration.

There are many other features which make the Orion Star™ A213 Dissolved Oxygen Meter the perfect choice and these are:

  • Plain language screen prompts
  • Soft keys that update from ease of selection
  • Multilanguage interface that supports English, Spanish, French, Italian, German and Chinese
  • For advance users - features such as stability and averaging options and flash expansion through the USB provide additional options
  • Holds up to 2000 data points
  • Powered either by universal power adapter or by batteries
  • Included electrode arm and newly designed probe holder makes it easier to maintain and place probes into samples
  • Data transfer and software up dates are possible with the USB and RS232 ports and included data analysis software
  • Faster BOD readings and control of the Orion™ AUTO-STIR™ polargraphic DO probe (086030MD) sold separately

Manufactured by: Thermo Scientific
Model: A213 Dissolved Oxygen Benchtop Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Accuracy (Polarographic DO) ±0.2 mg/L; ±2 % saturation
Accuracy (RDO) ±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, 10% of reading from 20 to 50mg/L; ±2 % saturation
Battery Life 800 hours
Battery Type Four AA (sold separately)
Data Points 2000
Description Orion Star A213 RDO/Dissolved Oxygen/Temperature Benchtop Meter
Display Type Graphic LCD with backlight
Hertz 50/60Hz
Inputs 9-pin Mini-DIN (RDO or polarographic DO with temperature probe), stirrer input
Outputs USB, RS232
Range (Polarographic DO) 0 to 90 mg/L; 0 to 600 % saturation
Range (RDO) 0 to 50 mg/L; 0 to 500 % saturation
Relative Humidity Range 5 to 85 %, non-condensing
Resolution (Polarographic DO) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Resolution (RDO) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Salinity Factor 0 to 45ppt
Saturation Range (RDO) 0 to 500% Saturation
Saturation Range (Polarographic DO) 0 to 600% Saturation
Sensor Types Polarographic or RDO (optical) DO probe - purchase separately
Accuracy (Temperature) ±0.1°C
Range (Temperature) 5 to +105°C
Resolution (Temperature) 0.1°C
Voltage 90 to 260VAC
Warranty 3 year meter replacement
Percent Saturation Resolution (RDO) 0.1, 1% Saturation
Calibration Modes Water-saturated air, manual (Winkler), air-saturated water, zero point
Certifications/Compliance IP-54
Percent Saturation Relative Accuracy (Polarographic DO) ±2% Saturation
Percent Saturation Relative Accuracy (RDO) ±2% Saturation
Percent Saturation Range (Polarographic DO) 0 to 600% Saturation
Saturation Range 0 to 600 % Saturation(polarographic); 0 to 500 % Saturation(RDO)
Saturation Resolution 0.1, 1% Saturation