For dissolved oxygen measurements in the field

Our portable dissolved oxygen meters are the top choice for ensuring proper oxygen levels for maximum process control on location.

Take control of your DO sample measurements without changing the environment around you.

 

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 Orion Star A323 Dissolved Oxygen
(STARA3230 series)
Orion Star A223 Dissolved Oxygen
(STARA2230 series)
Orion Star A123 Dissolved Oxygen
(STARA1230 series)
 Premium portable Dissolved Oxygen MetersAdvanced portable Dissolved Oxygen MetersBasic portable Dissolved Oxygen Meters
 Dependable and rugged field metersEasy-to-use, waterproof field metersBudget-friendly, simplified field meters
Ideal for
applications in:
Environmental, food and beverage, industrialChemical, water, wastewaterAcademic, power
Range (polarographic concentration)0 to 90 mg/L0 to 90 mg/L0 to 20 mg/L
Resolution (polarographic concentration)0.01, 0.1 mg/L0.01, 0.1 mg/L0.01, 0.1 mg/L
Relative accuracy (polarographic concentration)±0.2 mg/L or ±2% of reading, whichever is greater±0.2 mg/L or ±2% of reading, whichever is greater±0.2 mg/L
Range (polarographic saturation)0 to 600% saturation0 to 600% saturation0 to 200% saturation
Resolution (polarographic saturation)0.1, 1% saturation0.1, 1% saturation0.1, 1% saturation
Relative accuracy (polarographic saturation)±2% saturation or ±2% of reading, whichever is greater±2% saturation or ±2% of reading, whichever is greater±2% saturation
Range (RDO concentration)0 to 50 mg/L0 to 50 mg/L---
Resolution (RDO concentration)0.01, 0.1 mg/L0.01, 0.1 mg/L---
Relative accuracy (RDO concentration)±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±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---
Range (RDO % saturation)0 to 500% saturation0 to 500% saturation---
Resolution (RDO % saturation)0.1, 1% saturation0.1, 1% saturation---
Relative accuracy (RDO % saturation)±2% sat. ≤ 200% sat., ±10 % sat. > 200% sat.±2% sat. ≤ 200% sat., ±10% sat. > 200% sat.---
Barometric pressure correction400 to 850 mmHg, automatic or manual400 to 850 mmHg, automatic or manual---
Manual salinity factor correction0 to 45 ppt0 to 45 ppt0 to 45
Calibration featuresWater-saturated air, air saturated water, manual (Winkler), and zero pointWater-saturated air, air saturated water, manual (Winkler), and zero pointWater-saturated air, manual (Winkler)
Range (temperature)0 to 50ºC, 32 to 122ºF0 to 50ºC, 32 to 122ºF0 to 50ºC, 32 to 122ºF
Resolution (temperature)0.1ºC, 0.1ºF0.1ºC, 0.1ºF0.1ºC, 0.1ºF
Relative accuracy (temperature)±0.1ºC, 0.1ºF±0.1ºC, ±0.1ºF±0.1ºC, ±0.1ºF
Offset calibration (temperature)1 point1 pointYes
Memory5000 with time and date stamp1000 with time and date stamp50
Log functionManual, automatic with AUTO-READ or timedManual, automatic with AUTO-READManual, automatic with AUTO-READ
DO probe with built-in temperature9-pin mini-DIN9-pin mini-DIN9-pin mini-DIN
OutputRS232, USBRS232, USB--
AC adapter Optional—universal, 100–240 VACOptional—universal, 100–240 VACOptional—universal, 100–240 VAC
Battery powerIncluded—4AAsIncluded—4AAsIncluded—4AAs
Battery life800 hrs800 hrs2,000 hrs
  Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories ›

Complete your dissolved oxygen (DO) measurements faster

We offer a range of dissolved oxygen (DO) measurement instrumentation and accessories designed to meet your standards for performance and price. Our DO meters, DO probes, and standards are designed to offer maximum repeatability and accuracy in your DO readings.

Dissolved Oxygen (DO)
Benchtop Meters

dissolved oxygen testing meters

Experience the same dependable performance you value in the field in your lab. High-quality meters are essential to the critical, routine measurements you perform every day. We offer a wide range of benchtop disolved oxygen meters for your measurement needs, performance specifications, and budgetary constraints.

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Electrodes & Probes

electrodes and probes for dissolved oxygen measurement

Perform accurate and reproducible measurements in any application. Our wide selection of electrochemical probes, sensors, and electrodes are designed to make your complex measurements routine, reliable, and accurate—in the lab or in the field. Available in a variety of body materials, body styles, and sample requirements.

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Buffers and Solutions

Orion buffers and solutions

Using high-quality, fresh solutions to calibrate and maintain your electrodes, probes, and sensors is an essential part of good laboratory practices. Having fresh Thermo Scientific Orion solutions available for your routine calibration needs is the best way to ensure your data is both accurate and reproducible when accuracy is critical.

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Support

Knowledge Base: Certificates of Analysis and SDS for Orion, ROSS, AQUAfast, AquaMate, and AquaSensors products.

Orion Meters Software and Upgrades
Thermo Scientific Orion benchtop and portable meters are designed to help deliver accurate, consistent results, day after day. Boost productivity by upgrading your software today.

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