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Unlock precision and performance with Orion bench and portable pH/ORP meters. Whether in the lab or the field, achieve accurate measurements for pH and oxidation-reduction potential (ORP). Our bench pH/ORP meters are expertly engineered to provide precise laboratory analysis- featuring advanced functionality and robust data management. For field applications, our portable pH/ORP meters offer high performance in compact, easy-to-carry designs- ensuring reliable testing in a variety of environments. From detailed lab work to quick, on-the-go measurements, Orion pH/ORP meters are the ideal solution to help tackle your analytical challenges. Browse our complete portfolio or let one of our experts assist you in making the right selection.
Premium | Advanced | Basic | |
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Orion Versa Star Pro pH/ORP Bench Meter (Versa Star Pro series) | Orion Pro Star PH211 pH/ORP Bench Meter (Pro Star series) | Orion Lab Star PH111 pH/ORP Bench Meter (Lab Star series) | |
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Versatile, high-performance laboratory meters | Easy to use, dependable laboratory meters | Economical, simplified laboratory meters | |
Ideal for applications in: | Pharmaceuticals, biotechnology, industrial | Environmental, water/ wastewater, food & beverage, industrial | Academic, environmental, power |
pH range | –2.000 to 20.000 | –2.000 to 20.000 | –2.000 to 18.000 |
pH resolution | 0.001 / 0.01 / 0.1 | 0.001 / 0.01 / 0.1 | 0.001 / 0.01 / 0.1 |
pH calibration points | Up to 6 | Up to 5 | Up to 5 |
mV, RmV/ORP modes | Yes | Yes | Yes |
Temperature range | -5 to 105°C 23 to 221°F | -30 to 130°C -22 to 266°F | -5 to 105°C 23 to 221°F |
Number of channels | 4, customizable with modules | 1 | 1 |
Stirrer probe inputs | 2 | 1 | — |
Display | 5.3-inch, backlit color display | 7-inch, high-resolution, backlit color display | 5-inch, backlit segmented display |
Touchscreen | No | Yes | No |
Onscreen text prompts | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions | Basic calibration and setup instructions |
Identification options | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID | — |
Data log | 2000 with date/time | 10000 with date/time | 500 with date/time |
Calibration log | 30 per parameter | 20 per parameter | — |
Data export options | Computer, printer | Computer, printer, USB flash drive | Computer, printer |
Power supply | Universal, 100–240 VAC, 50-60 Hz (Cat. No. STARA-PWR) | Universal, 100-240 VAC, 50-60 Hz (Cat. No. PSTAR-PWR), 9 DC adapter, 2.0A | Universal, 100-240 VAC, 50-60 Hz (Cat. No. LSTAR-PWR), 9 DC adapter, 1.3A |
Premium | Advanced | Basic | |
---|---|---|---|
Orion Star A321 pH Portable Meter (Star A3210 series) | Orion Star A221 pH Portable Meter (Star A2210 series) | Orion Star A121 pH Portable Meter (Star A1210 series) | |
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Premium rugged, easy-to-use portable field meters | Advanced portable meters, easy-to-use, dependable field meters | Basic portable meters, budget-friendly, simplified field meters | |
Ideal for applications in: | pH, mV, ORP, and temperature testing, and field applications | Advanced pH analysis ideal for outdoor environments and field applications | IP67-rated housing for rugged protection in outdoor environments |
pH range | –2.000 to 20.000 pH | –2.000 to 20.000 pH | 2.00 to 16.00 pH |
pH resolution | 0.1. 0.01, 0.001 pH | 0.1. 0.01, 0.001 pH | 0.1. 0.01 pH |
pH relative accuracy | ±0.002 pH | ±0.002 pH | ±0.01 pH |
pH calibration points | Up to 5 | Up to 5 | Up to 3 |
mV mode | Yes | Yes | Yes |
ORP mode | Yes | Yes | No |
Range (temperature) | –5.0° to 105.0°C, 22.0° to 221.0°F | –5.0° to 105.0°C, 22.0° to 221.0°F | –5.0° to 105.0°C, 22.0° to 221.0°F |
Temperature compensation | Automatic or manual | Automatic or manual | Automatic or manual |
Data points | 5000 with date and time stamp | 1000 with date and time stamp | 50 |
Data export options | RS232, USB | RS232, USB | --- |
Power supply | 4 AA batteries: 800 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) | 4 AA batteries: 800 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) | 4 AA batteries: 2,000 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) |
Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories › |
Advanced | Basic | |
---|---|---|
Eutech pH2700 pH Bench Meter | Eutech 1710 pH Bench Meter | |
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Economical, routine laboratory meters | Budget-friendly, simple laboratory meters | |
pH range | -2.000 to 20.000 | -2.00 to 18.00 |
pH resolution | 0.001 / 0.01 / 0.1 | 0.01 |
pH calibration points | Up to 6 | Up to 5 |
mV, RmV modes | Yes | Yes |
ORP mode | Yes | Yes |
Temperature range | 0.0 to 100.0 °C, 32.0 to 212.0 °F | -5.0 to 105.0 °C |
Backlit display | Yes | Yes |
Onscreen text prompts | Basic calibration and setup prompts | Basic calibration and setup prompts |
Number of channels | 1 | 1 |
Data log | 500 with date/time | 100 |
Calibration log | Most recent viewable on meter and stored in meter memory | Active pH, RmV, temperature with time and date |
Data export options | RS232 | Computer or printer |
Power supply | Universal, 100-240VAC, 50/60 Hz, Cat. No. 60X426401 | Universal, 100–240VAC, 50–60Hz (Cat. No. EB1700PWR), 9 DC adapter, 1.3A |
Watch the video and learn more.
Premium | Advanced | Basic | |
---|---|---|---|
Orion Versa Star Pro pH/ORP Bench Meter (Versa Star Pro series) | Orion Pro Star PH211 pH/ORP Bench Meter (Pro Star series) | Orion Lab Star PH111 pH/ORP Bench Meter (Lab Star series) | |
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Versatile, high-performance laboratory meters | Easy to use, dependable laboratory meters | Economical, simplified laboratory meters | |
Ideal for applications in: | Pharmaceuticals, biotechnology, industrial | Environmental, water/ wastewater, food & beverage, industrial | Academic, environmental, power |
pH range | –2.000 to 20.000 | –2.000 to 20.000 | –2.000 to 18.000 |
pH resolution | 0.001 / 0.01 / 0.1 | 0.001 / 0.01 / 0.1 | 0.001 / 0.01 / 0.1 |
pH calibration points | Up to 6 | Up to 5 | Up to 5 |
mV, RmV/ORP modes | Yes | Yes | Yes |
Temperature range | -5 to 105°C 23 to 221°F | -30 to 130°C -22 to 266°F | -5 to 105°C 23 to 221°F |
Number of channels | 4, customizable with modules | 1 | 1 |
Stirrer probe inputs | 2 | 1 | — |
Display | 5.3-inch, backlit color display | 7-inch, high-resolution, backlit color display | 5-inch, backlit segmented display |
Touchscreen | No | Yes | No |
Onscreen text prompts | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions | Basic calibration and setup instructions |
Identification options | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID | — |
Data log | 2000 with date/time | 10000 with date/time | 500 with date/time |
Calibration log | 30 per parameter | 20 per parameter | — |
Data export options | Computer, printer | Computer, printer, USB flash drive | Computer, printer |
Power supply | Universal, 100–240 VAC, 50-60 Hz (Cat. No. STARA-PWR) | Universal, 100-240 VAC, 50-60 Hz (Cat. No. PSTAR-PWR), 9 DC adapter, 2.0A | Universal, 100-240 VAC, 50-60 Hz (Cat. No. LSTAR-PWR), 9 DC adapter, 1.3A |
Premium | Advanced | Basic | |
---|---|---|---|
Orion Star A321 pH Portable Meter (Star A3210 series) | Orion Star A221 pH Portable Meter (Star A2210 series) | Orion Star A121 pH Portable Meter (Star A1210 series) | |
![]() | ![]() | ![]() | |
Premium rugged, easy-to-use portable field meters | Advanced portable meters, easy-to-use, dependable field meters | Basic portable meters, budget-friendly, simplified field meters | |
Ideal for applications in: | pH, mV, ORP, and temperature testing, and field applications | Advanced pH analysis ideal for outdoor environments and field applications | IP67-rated housing for rugged protection in outdoor environments |
pH range | –2.000 to 20.000 pH | –2.000 to 20.000 pH | 2.00 to 16.00 pH |
pH resolution | 0.1. 0.01, 0.001 pH | 0.1. 0.01, 0.001 pH | 0.1. 0.01 pH |
pH relative accuracy | ±0.002 pH | ±0.002 pH | ±0.01 pH |
pH calibration points | Up to 5 | Up to 5 | Up to 3 |
mV mode | Yes | Yes | Yes |
ORP mode | Yes | Yes | No |
Range (temperature) | –5.0° to 105.0°C, 22.0° to 221.0°F | –5.0° to 105.0°C, 22.0° to 221.0°F | –5.0° to 105.0°C, 22.0° to 221.0°F |
Temperature compensation | Automatic or manual | Automatic or manual | Automatic or manual |
Data points | 5000 with date and time stamp | 1000 with date and time stamp | 50 |
Data export options | RS232, USB | RS232, USB | --- |
Power supply | 4 AA batteries: 800 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) | 4 AA batteries: 800 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) | 4 AA batteries: 2,000 hrs. battery life (included) or optional universal, 100–240 VAC (sold separately) |
Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories › |
Advanced | Basic | |
---|---|---|
Eutech pH2700 pH Bench Meter | Eutech 1710 pH Bench Meter | |
![]() | ![]() | |
Economical, routine laboratory meters | Budget-friendly, simple laboratory meters | |
pH range | -2.000 to 20.000 | -2.00 to 18.00 |
pH resolution | 0.001 / 0.01 / 0.1 | 0.01 |
pH calibration points | Up to 6 | Up to 5 |
mV, RmV modes | Yes | Yes |
ORP mode | Yes | Yes |
Temperature range | 0.0 to 100.0 °C, 32.0 to 212.0 °F | -5.0 to 105.0 °C |
Backlit display | Yes | Yes |
Onscreen text prompts | Basic calibration and setup prompts | Basic calibration and setup prompts |
Number of channels | 1 | 1 |
Data log | 500 with date/time | 100 |
Calibration log | Most recent viewable on meter and stored in meter memory | Active pH, RmV, temperature with time and date |
Data export options | RS232 | Computer or printer |
Power supply | Universal, 100-240VAC, 50/60 Hz, Cat. No. 60X426401 | Universal, 100–240VAC, 50–60Hz (Cat. No. EB1700PWR), 9 DC adapter, 1.3A |
Watch the video and learn more.
Shop our comprehensive range of meter accessories designed to boost productivity, safeguard your investment and ensure optimal performance. Our assortment of accessories for bench and portable meters helps streamline your workflow while enhancing your user experience.
Obtain accurate results with electrodes and probes developed to support the requirements of your sample testing. Choose from a wide variety of parameters, body materials, body styles, fill types, reference systems, junctions and more to meet the needs of your application.
Ensure the reliability of your measurements with our premium buffers and solutions. Our high-quality calibration and maintenance solutions are essential for precise and consistent results. Shop a variety of buffers, buffer kits, electrode filling solutions, electrode storage solutions and more.
The Thermo Scientific Orion Lab Star PH111 pH/mV Bench Meter is ideally suited for laboratories with users of varying levels of technical expertise and who require a simple-to-calibrate and use meter for routine pH testing. See why they're the preferred choice for laboratory professionals- named “Best New General Lab Product”, Scientists’ Choice Awards 2023. Watch this video to explore the features available with the Orion Lab Star pH/mV Bench Meter.
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Validation and qualification (IQ/OQ) services for Thermo Scientific Orion bench and portable meters are currently available through Unity Lab Services in the United States ›
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.