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Thermo Scientific Orion Star A223 Dissolved Oxygen Portable Meter

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Record accurate and reliable dissolved oxygen and temperature measurements. This instrument is ideal for a wide range of applications and advanced dissolved oxygen analysis in the field.

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Product Description

Don’t leave your measurements to chance when analyzing samples outside the lab. Orion Star A223 RDO/DO portable meters are designed to offer the reliability you need in a user-friendly package for your dedicated dissolved oxygen testing needs. This waterproof, portable meter displays critical data with your measurement including temperature, date and time, read type, measurement stability, active calibration info and power source status.
    • 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 and Continuous shows changing readings with hold option
    • Data log collects and date/time stamps up to 1000 measurement sets
    • 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 AA batteries or optional universal power adapter
    • IP67-rated housing is waterproof for rugged field operation
    • Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand


Barometric Pressure Correction400 to 850mmHg, automatic using built-in barometer or manual entry
DescriptionOrion Star A223 RDO/DO portable meter kit with RDO optical DO sensor, meter armor and field case
OutputsUSB, RS232
IncludesRDO optical DO sensor, meter armor and field case
Measurement ModesDissolved Oxygen (% Saturation), Dissolved Oxygen (mg/L with Temperature and Barometric Pressure)
Sensor TypesRDO 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
Accuracy (Polarographic DO)±0.2mg/L or ±2% of reading, whichever is greater
Pressure Range400 to 850mmHg
Calibration ModesWater-saturated air, air-saturated water, manual (Winkler titration), zero point
Temperature (Metric) Range0.0°C to 50.0°C
Resolution (Temperature)0.1°C (0.1°F)
Accuracy (Temperature)±0.1°C
Temperature SelectionAutomatic with ATC temperature probe
Temperature Probe Calibration1 point temperature offset calibration
Display TypeGraphic LCD with Backlight
Backlight OptionYes, selectable
MemoryNon-volatile memory preserves data log, calibration log and meter settings
Data Points1000 with date and time stamp
Log Function TypeAutomatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Data Management DetailsTransfer single, range or all data points to printer or computer
Alarm OutputCalibration due alarm (fixed 12 hour)
Inputs9 pin MiniDIN (RDO optical or polarographic DO sensor with built-in temperature)
Certifications/ComplianceCE, TUV 3-1, FCC Class A
IP RatingIP-67
AC AdapterUniversal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Dimensions (L x W x H)24 cm x 10 cm x 6.5 cm (9.5 in. x 3.9 in. x 2.6 in.)
Weight (Metric)0.5 kg
Weight (English)1.2 lb.
Relative Humidity Range5 to 85 %, non-condensing
Warranty3 Year Meter Warranty
Percent Saturation Range Polarographic DO0.0 to 600.0 % saturation
KeypadComprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
LanguagesEnglish, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Accuracy (RDO)±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, ±10% of reading up to 50mg/L
Range (RDO)0.00 to 50.00mg/L
Methods10 per channel with password protection
ModelOrion Star A223 RDO Optical/Dissolved Oxygen/Temperature Portable Meter
Percent Saturation Relative Accuracy (RDO)±2 % saturation ≤ 200 % saturation, ±10 % saturation > 200 % saturation
Percent Saturation Resolution (Polarographic DO)0.1, 1 % saturation
Percent Saturation Range (RDO)0.0 to 500.0 % saturation
Percent Saturation Relative Accuracy (Polarographic DO)±2 % saturation or ±2% of reading whichever is greater
Percent Saturation Resolution (RDO)0.1, 1 % saturation
Power Supply4 AA batteries (included) or universal AC adapter (sold separately)
Pressure Resolution1mmHg
Probe TypeRDO optical dissolved oxygen probe, polarographic dissolved oxygen probe (includes 087010MD Orion RDO optical DO sensor)
Resolution (RDO)0.01, 0.1mg/L
Salinity Factor0.0 to 45.0 ppt, automatic correction using manual entry of sample salinity
StabilitySmart Stability and Smart Averaging
Temperature (English) Operating41°F to 113°F (ambient)
Temperature (Metric) Operating5°C to 45°C (ambient)
Battery Life800 hours
Battery TypeFour AA (included)
Accuracy (Barometer)±6mmHg
Unit SizeEach

We’re a supplier to the commercial winery, brewery, cidery & distillery industries across Canada & North America. Please fill in the form below to contact our in-house winemakers and sales consultants. We’ll get back to you within 1-2 working days.

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