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Thermo Scientific Orion

Star A323 Dissolved Oxygen Portable Meter

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The Thermo Scientific Orion Star A323 RDO/ Dissolved Oxygen Portable Meter is the top choice for advanced measurements on location. Get the information you need quickly and easily from the large, backlit graphic LCD display. Informative display shows dissolved oxygen in percent saturation or concentration with temperature and electrode status, time, date, sample ID, user ID and calibration points. Advanced features such as stability and averaging options provide additional options allowing for laboratory accuracy everywhere you need it.

  • 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, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals
  • Calibrate using water-saturated air, air-saturated water, a Winkler titration or zero point calibration
  • Non-volatile memory holds up to 5000 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
  • Three year meter replacement manufacturer warranty

Certifications: CE, TUV, FCC Class A limits

Temperature Mode
Range-5° to 105° (23° to 221°)
Resolution0.1 (0.1)
Relative Accuracy±0.1
DO Mode
Concentration RangePolarographic: 0 to 90mg/L;
RDO optical: 0 to 50mg/L
Concentration Resolution0.01, 0.1
Relative AccuracyPolarographic: ±0.2mg/L; ±2%
RDO optical: ±0.1mg/L up to 8mg/L, ±0.2mg/L up to 20mg/L, 10% of reading beyond; ±2%
% Saturation RangePolarographic: 0 to 600;
RDO optical: 0 to 500
% Saturation Resolution0.1, 1
Salinity Factor0 to 45 ppt, manual
CalibrationWater-saturated air, air-saturated water, manual (Winkler) and zero point
Inputs9-pin mini-DIN
Sensor TypesPolarographic or RDO (optical/luminesce-based) DO
Data Management2000 points with date/time stamp
OutputRS-232, USB
DisplayGraphic LCD; simultaneous display of measurement, temperature, date/time, sample ID, user ID and more
Power SupplyFour "AA" batteries or optional universal AC line voltage
Environmental Operating Conditions
Relative Humidity5 to 85% noncondensing
Manufacturer Warranty3-year meter replacement

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Thomas No.
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Star A323 RDO/DO Hand-Held Meter
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Thomas No.
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Star A323 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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