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Thermo Scientific Orion Star A323 RDO/Dissolved Oxygen Portable Meter

Part Number: STARA3230

List Price



-$102.00 (10.6%)  


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3 year meter replacement warranty

AC Adapter

Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)

Accuracy Barometer

6 mmHg

Accuracy Percent Saturation (Polarographic DO)

2 % saturation or 2% of reading whichever is greater

Accuracy Percent Saturation (RDO)

2 % saturation ? 200 % saturation, 10 % saturation > 200 % saturation

Accuracy Polarographic DO

0.2 mg/L or 2% of reading, whichever is greater

Accuracy RDO

0.1 mg/L up to 8 mg/L, 0.2 mg/L from 8 to 20 mg/L, 10% of reading up to 50 mg/L

Accuracy Temperature


Alarm Output

High/low limit alarm, calibration due alarm


Yes, selectable

Barometric Pressure Correction

400 to 850 mmHg, automatic using built-in barometer or manual entry

Battery Life (Average)

800 hours

Battery Type

Four AA (included)

Calibration Modes

Water-saturated air, air-saturated water, manual (Winkler titration), zero point

Certifications Compliance

CE, TUV 3-1, FCC Class A



Data Log Function Type

Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous measure mode

Data Management Details

Transfer single, range or all data points to printer or computer

Data Points

5000 with date and time stamp


Orion Star A323 RDO/DO portable meter

Dimensions LxWxH

24 cm x 10 cm x 6.5 cm (9.5'' x 3.9'' x 2.6'')

Display Type

Graphic LCD with backlight


Star A323 RDO/DO meter, 4 AA batteries, literature, computer cable and calibration test certificate


9 pin MiniDIN (RDO optical or polarographic DO sensor with built-in temperature)

IP Rating



Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys


English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update

Measurement Modes

Dissolved oxygen as % saturation or mg/L with temperature and barometric pressure


Non-volatile memory preserves data log, calibration log and meter settings


10 per channel with password protection


Orion Star A323 RDO Optical/Dissolved Oxygen/Temperature Portable Meter


USB, RS232

Power Supply

4 AA batteries (included) or universal AC adapter (sold separately)

Range Barometric Pressure

400 to 850 mmHg

Range Percent Saturation (Polarographic DO)

0.0 to 600.0 % saturation

Range Percent Saturation (RDO)

0.0 to 500.0 % saturation

Range Polarographic DO

0.00 to 90.00 mg/L

Range RDO

0.00 to 50.00 mg/L

Range Temperature

0.0 to 50.0 C, 32.0 to 122.0 F

Relative Humidity Range

5 to 85 %, non-condensing

Resolution Barometric Pressure

1 mmHg

Resolution Percent Saturation (Polarographic DO)

0.1, 1 % saturation

Resolution Percent Saturation (RDO)

0.1, 1 % saturation

Resolution Polarographic DO

0.01, 0.1 mg/L

Resolution RDO

0.01, 0.1 mg/L

Resolution Temperature

0.1C, 0.1F

Salinity Correction Factor

0.0 to 45.0 ppt, automatic correction using manual entry of sample salinity

Sensor Types

RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor


Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting

Temperature Ambient Operating

5 to 45C, 41 to 113F

Temperature Probe Calibration

1 point temperature offset calibration

Temperature Selection

Automatic with ATC temperature probe


3 year meter warranty


0.5 kg, 1.2 lbs

Included with Purchase

Orion Star A323 Dissolved Oxygen Portable Meter

Four AA batteries (installed)

Star A323 Models with Other Options



Orion Star A323 Dissolved Oxygen Portable Meter

087010MD Orion RDO optical/luminescence-based probe with 3m cable, stainless steel guard, calibration sleeve and optical/luminescence-based cap

Protective armor with electrode holder

Hard carrying case

Four AA batteries (installed)


STARA3235 Full Specs and Ordering Information


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All information current as of Monday, October 24, 2016