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Thermo Scientific Orion

Orion Star A223 RDO/Dissolved Oxygen Portable Meter

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Get the readings that you need where you need them with the Thermo Scientific Orion Star A223 RDO/Dissolved Oxygen Portable Meter. The large, backlit graphic LCD display shows dissolved oxygen in percent saturation or concentration with temperature and electrode status, time, date and calibration points.

  • Anyone can use this meter with its plain language screen prompts, soft keys that update for easy selection and a multilanguage interface that supports English, Spanish, French, Italian, German and Chinese
  • No need to worry about DO probe compatibility – the meter accepts and automatically recognizes Orion polarographic and RDO optical/ luminescence-based probes
  • Accurate results are easy with automatic temperature, manual salinity and automatic/ manual barometric pressure compensation
  • Don’t miss a reading – AUTO-READ™ locks in the stable reading on your screen and ready indicator alerts when readings are stable
  • Calibrate using water-saturated air, air-saturated water, a Winkler titration or zero point calibration
  • Non-volatile memory holds up to 1000 data points with time and date stamp
  • Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software
  • Four AA batteries (included) provide over 800 hours of operation or purchase the universal power adapter (sold separately) to use AC power
  • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing
  • 3 year manufacturer's meter replacement warranty
Dissolved Oxygen
Concentration - Polarographic
Range0 to 90 mg/L
Resolution0.01, 0.1
Relative Accuracy±0.2
% Saturation - Polarographic
Range0 to 600
Resolution0.1, 1
Relative Accuracy±2 %
Concentration - RDO
Range0 to 50 mg/L
Resolution0.01, 0.1
Relative Accuracy±0.1 mg/L up to 8 mg/L; ±0.2 mg/L from 8 to 20 mg/L; 10 % of reading from 20 to 50 mg/L
% Saturation - RDO
Range0 to 500
Resolution0.1, 1
Relative Accuracy±2 %
Manual Barometric Pressure Correction450.0 to 850.0 mm Hg
Manual Salinity Factor Correction0 to 45 ppt
Calibration FeaturesWater saturated air, air saturated water, manual (Winkler) and zero point
Probe CharacteristicsPolarographic or RDO
Range0 to 50 °C, 32 to 122 ºF
Relative Accuracy±0.1
Offset Calibration1 point
Number of Points1000 with time and date stamp
Log FunctionManual, Automatic with AUTO-READ™
Log EditDelete last reading or all
DO with Temperature Probe9-pin mini-DIN
AC AdapterOptional – universal, 100-240 VAC
Battery PowerIncluded – 4 AAs
Battery Life800 hrs

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Thomas No.
Mfr. No.
Star A223 RDO/DO Hand-Held Meter
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Thomas No.
Mfr. No.
Star A223 RDO/DO Hand-Held Meter; 087010MD RDO Optical DO Probe with 3 Meter Cable; STARA-CS Star A Hand-Held Meter Hard Carrying Case; STARA-AR Star A Hand-Held Meter Armor with Stand and Electrode Holders
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