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 Meters Advanced portable Dissolved Oxygen Meters Basic portable Dissolved Oxygen Meters
  Dependable and rugged field meters Easy-to-use, waterproof field meters Budget-friendly, simplified field meters
Ideal for
applications in:
Environmental, food and beverage, industrial Chemical, water, wastewater Academic, power
Range (polarographic concentration) 0 to 90 mg/L 0 to 90 mg/L 0 to 20 mg/L
Resolution (polarographic concentration) 0.01, 0.1 mg/L 0.01, 0.1 mg/L 0.01, 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% saturation 0 to 600% saturation 0 to 200% saturation
Resolution (polarographic saturation) 0.1, 1% saturation 0.1, 1% saturation 0.1, 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/L 0 to 50 mg/L ---
Resolution (RDO concentration) 0.01, 0.1 mg/L 0.01, 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% saturation 0 to 500% saturation ---
Resolution (RDO % saturation) 0.1, 1% saturation 0.1, 1% saturation ---
Relative accuracy (RDO % saturation) ±2% sat. ≤ 200% sat., ±10 % sat. > 200% sat. ±2% sat. ≤ 200% sat., ±10% sat. > 200% sat. ---
Barometric pressure correction 400 to 850 mmHg, automatic or manual 400 to 850 mmHg, automatic or manual ---
Manual salinity factor correction 0 to 45 ppt 0 to 45 ppt 0 to 45
Calibration features Water-saturated air, air saturated water, manual (Winkler), and zero point Water-saturated air, air saturated water, manual (Winkler), and zero point Water-saturated air, manual (Winkler)
Range (temperature) 0 to 50ºC, 32 to 122ºF 0 to 50ºC, 32 to 122ºF 0 to 50ºC, 32 to 122ºF
Resolution (temperature) 0.1ºC, 0.1ºF 0.1ºC, 0.1ºF 0.1ºC, 0.1ºF
Relative accuracy (temperature) ±0.1ºC, 0.1ºF ±0.1ºC, ±0.1ºF ±0.1ºC, ±0.1ºF
Offset calibration (temperature) 1 point 1 point Yes
Memory 5000 with time and date stamp 1000 with time and date stamp 50
Log function Manual, automatic with AUTO-READ or timed Manual, automatic with AUTO-READ Manual, automatic with AUTO-READ
DO probe with built-in temperature 9-pin mini-DIN 9-pin mini-DIN 9-pin mini-DIN
Output RS232, USB RS232, USB --
AC adapter  Optional—universal, 100–240 VAC Optional—universal, 100–240 VAC Optional—universal, 100–240 VAC
Battery power Included—4AAs Included—4AAs Included—4AAs
Battery life 800 hrs 800 hrs 2,000 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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