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Ion Concentration Meters
Perform your ion concentration measurements with confidence
Achieve precise and reliable ion concentration measurements with Orion bench and portable ion concentration meters. Ideal for various applications, including pharmaceuticals, environmental monitoring, agriculture, food and beverage production and more, Orion ion concentration meters help you meet industry standards and achieve regulatory compliance. Combining advanced technology, user-friendly interfaces, and robust construction, these meters ensure accurate results. Suitable for both lab and field use, they measure using ion-selective electrode technology. Explore Orion ion concentration meters for precision and reliability. Browse our complete portfolio or let one of our experts assist you in making the right selection.
Premium | Advanced | ||
|---|---|---|---|
| Orion Versa Star Pro pH/Ion Bench Meter (Versa Star Pro series) | Orion Pro Star PI217 Dual Channel pH/Ion Bench Meter (Pro Star series) | Orion Pro Star PI214 pH/Ion Bench Meter (Pro Star series) | |
 |  |  | |
| Versatile, high-performance laboratory meters | Easy to use, dependable laboratory meters | Easy to use, dependable laboratory meters | |
| Ideal applications | Pharmaceuticals, biotechnology, industrial | Environmental, water/ wastewater, food & beverage, industrial | Environmental, water/ wastewater, food & beverage, industrial |
| pH range | -2.000 to 20.000 | -2.000 to 20.000 | -2.000 to 20.000 |
| 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 |
| Automatic buffer sets | USA/NIST, DIN, custom | USA/NIST, DIN, pure water, standard, custom | USA/NIST, DIN, pure water, standard, custom |
| Ion concentration range | 0.0001 to 19990 | 0.0001 to 19990 | 0.0001 to 19990 |
| Incremental techniques | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction |
| Temperature range | -5 to 105°C 23 to 221°F | -30 to 130°C -22 to 266°F | -30 to 130°C -22 to 266°F |
| Number of channels | 4, customizable with modules | 2 | 1 |
| Stirrer probe inputs | 2 | 2 | 1 |
| Display | 5.3-inch, backlit color display | 7-inch, high-resolution, backlit color display | 7-inch, high-resolution, backlit color display |
| Touchscreen | No | Yes | Yes |
| Onscreen text prompts | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions |
| Identification options | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID |
| Data log | 2000 with date/time | 10000 with date/time | 10000 with date/time |
| Calibration log | 30 per parameter and channel | 20 per parameter and channel | 20 per parameter |
| Data export options | Computer, printer | Computer, printer, USB flash drive | Computer, printer, USB flash drive |
| 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. PSTAR-PWR), 9 DC adapter, 2.0A |
Premium | Advanced | |
|---|---|---|
| Orion Star A329 pH/ISE (STARA3290 series) | Orion Star A324 pH/ISE (STARA3240 series) | |
 |  | |
| Versatile, powerful, multiparameter meter | Rugged and dependable multi-parameter meter | |
| Ideal for applications in: | Industrial—waste water, drinking water, food & beverage; Environmental—lakes, ponds | Industrial—waste water, cooling tanks; Environmental—lakes, ponds |
| pH range | –2.000 to 20.000 | –2.000 to 20.000 |
| pH resolution | 0.1/0.01/0.001 | 0.1/0.01/0.001 |
| pH relative accuracy | ±0.002 | ±0.002 |
| pH calibration points | Up to 5 | Up to 5 |
| pH calibration editing | Yes | Yes |
| Range (mV) | ±2000.0 mV | ±2000.0 mV |
| Resolution (mV) | 0.1 mV | 0.1 mV |
| Relative accuracy | ±0.2 mV or ±0.05% of reading, whichever is greater | ±0.2 mV or ±0.05% of reading, whichever is greater |
| EH ORP mode | Yes | Yes |
| Range (ISE) | 0.0001 to 19,900 | 0.0001 to 19,900 |
| Resolution (ISE) | 0.0001 minimum, auto ranging, up to 3 significant digits (user selectable) | 0.0001 minimum, auto ranging, up to 3 significant digits (user selectable) |
| Relative accuracy (ISE) | ±0.2 mV or ±0.05% of reading, whichever is greater | ±0.2 mV or ±0.05% of reading, whichever is greater |
| Units | ppm, M, mg/L, %, ppb, none | ppm, M, mg/L, %, ppb, none |
| Calibration points | Up to 5 | Up to 5 |
| Calibration editing | Yes | Yes |
| Calibration features | Linear point to point, non-linear selectable auto-blank, low concentration range stability | Linear point to point, non-linear selectable auto-blank, low concentration range stability |
| Range (temperature) | –5 to 105ºC, 23 to 221ºF | –5 to 105ºC, 23 to 221ºF |
| Resolution (temperature) | 0.1ºC, 0.1ºF | 0.1ºC, 0.1ºF |
| Relative accuracy (temperature) | ±0.1ºC, ±0.1ºF | ±0.1ºC, ±0.1ºF |
| Temperature offset calibration | 1 point | 1 point |
| Number of datalogs | 5,000 with time and date stamp | 5,000 with time and date stamp |
| Log function | Manual, ready (includes AUTOREAD), timed | Manual, ready, (includes AUTO-READ), timed |
| pH electrode or ISE | BNC, reference pin | BNC, reference pin |
| Conductivity or ATC probe | 8-pin mini DIN | 8-pin mini-DIN |
| DO probe | 9-pin mini-DIN | -- |
| Outputs | RS232, USB | RS232, USB |
| AC adapter | Optional—universal, 100–240VAC | Optional—universal, 100-240VAC |
| Battery power | Included—4AAs | Included—4 AAs |
| Battery life | 800 hrs | 800 hrs |
| Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories › | ||
Advanced | |
|---|---|
| Eutech ION2700 pH/Ion Bench Meter | |
 | |
| Economical, routine laboratory meters | |
| pH range | –2.000 to 20.000 |
| pH resolution | 0.001 / 0.01 / 0.1 |
| pH calibration points | Up to 6 |
| mV, RmV modes | Yes |
| Ion concentration range | 0.001 to 19900 ppm |
| Ion calibration points | 2 to 8 |
| Range (temperature) | 0.0 to 100.0 °C, 32.0 to 212.0 °F |
| Number of channels | 1 |
| Data log | 500 with date/time |
| Calibration log | Most recent viewable on meter and stored in meter memory |
| Data export options | RS232 |
| Power supply | Universal, 100-240VAC, 50/60 Hz, Cat. No. 60X426401 |
| Premium | Advanced | Basic | |
|---|---|---|---|
| Eutech pH 450 Portable Meter | Eutech pH 620 Portable Meter | Eutech ION 6+ Portable Meter | |
 |  |  | |
| pH range | –2.00 to 16.00 pH | -2.000 to 20.000 pH | 0.00 to 14.00 pH |
| pH resolution | 0.01 pH | 0.1 / 0.01 / 0.001 pH | 0.01 pH |
| pH relative accuracy | ±0.01 pH | ±0.002 pH | ±0.01 pH |
| pH calibration points | Up to 6 | Up to 6 | Up to 3 |
| Range (mV) | ±2000 mV | ±2000 mV | ±500 mV |
| Resolution (mV) | 0.1 mV ±999.9 mV; 1 mV beyond | 0.1 mV | 0.1 mV (±199.9 mV) / 1 mV beyond |
| Relative accuracy | ±0.2 mV +2 LSD or +0.5 % of reading; whichever is greater | ±0.2 mV + 1 LSD | ±0.2 mV / ±2 mV + 1 LSD |
| pH ORP Mode | --- | Yes | Yes |
| Range (ISE) | 0.0 to 2000 ppm | 0.001 to 19900 | 0.01 to 0.99 / 1.0 to 199.9 / 200 to 1999 ppm |
| Calibration points | From 2-4 or 2-5 | Up to 8 | Up to 3 |
| Range (temperature) | -10.0 to 110.0 ºC (14.0 to 230.0 ºF) | -10.0 to 110.0 °C (14.0 to 230.0 °F) | 0.0 to 100.0 ºC |
| Number of datalogs | 500 with time and date stamp | 500 with time and date stamp | --- |
| Data export options | USB or RS232 | RS232C through LED, IrDA | --- |
| AC adapter | 9 V DC adapter, 1.3 A (100/240 VAC, SMPS) (optional) | 9 V DC adapter (500 mA) | --- |
| Battery power | Two AA batteries (included) | Included—(4) AA | 4 x AAA batteries |
Premium | Advanced | ||
|---|---|---|---|
| Orion Versa Star Pro pH/Ion Bench Meter (Versa Star Pro series) | Orion Pro Star PI217 Dual Channel pH/Ion Bench Meter (Pro Star series) | Orion Pro Star PI214 pH/Ion Bench Meter (Pro Star series) | |
| | | |
| Versatile, high-performance laboratory meters | Easy to use, dependable laboratory meters | Easy to use, dependable laboratory meters | |
| Ideal applications | Pharmaceuticals, biotechnology, industrial | Environmental, water/ wastewater, food & beverage, industrial | Environmental, water/ wastewater, food & beverage, industrial |
| pH range | -2.000 to 20.000 | -2.000 to 20.000 | -2.000 to 20.000 |
| 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 |
| Automatic buffer sets | USA/NIST, DIN, custom | USA/NIST, DIN, pure water, standard, custom | USA/NIST, DIN, pure water, standard, custom |
| Ion concentration range | 0.0001 to 19990 | 0.0001 to 19990 | 0.0001 to 19990 |
| Incremental techniques | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction | Single known addition or subtraction, double known addition or subtraction, analyte (sample) addition or subtraction |
| Temperature range | -5 to 105°C 23 to 221°F | -30 to 130°C -22 to 266°F | -30 to 130°C -22 to 266°F |
| Number of channels | 4, customizable with modules | 2 | 1 |
| Stirrer probe inputs | 2 | 2 | 1 |
| Display | 5.3-inch, backlit color display | 7-inch, high-resolution, backlit color display | 7-inch, high-resolution, backlit color display |
| Touchscreen | No | Yes | Yes |
| Onscreen text prompts | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions | Step-by-step calibration and guided setup instructions |
| Identification options | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID | Electrode ID, sample ID, user ID |
| Data log | 2000 with date/time | 10000 with date/time | 10000 with date/time |
| Calibration log | 30 per parameter and channel | 20 per parameter and channel | 20 per parameter |
| Data export options | Computer, printer | Computer, printer, USB flash drive | Computer, printer, USB flash drive |
| 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. PSTAR-PWR), 9 DC adapter, 2.0A |
Premium | Advanced | |
|---|---|---|
| Orion Star A329 pH/ISE (STARA3290 series) | Orion Star A324 pH/ISE (STARA3240 series) | |
| | |
| Versatile, powerful, multiparameter meter | Rugged and dependable multi-parameter meter | |
| Ideal for applications in: | Industrial—waste water, drinking water, food & beverage; Environmental—lakes, ponds | Industrial—waste water, cooling tanks; Environmental—lakes, ponds |
| pH range | –2.000 to 20.000 | –2.000 to 20.000 |
| pH resolution | 0.1/0.01/0.001 | 0.1/0.01/0.001 |
| pH relative accuracy | ±0.002 | ±0.002 |
| pH calibration points | Up to 5 | Up to 5 |
| pH calibration editing | Yes | Yes |
| Range (mV) | ±2000.0 mV | ±2000.0 mV |
| Resolution (mV) | 0.1 mV | 0.1 mV |
| Relative accuracy | ±0.2 mV or ±0.05% of reading, whichever is greater | ±0.2 mV or ±0.05% of reading, whichever is greater |
| EH ORP mode | Yes | Yes |
| Range (ISE) | 0.0001 to 19,900 | 0.0001 to 19,900 |
| Resolution (ISE) | 0.0001 minimum, auto ranging, up to 3 significant digits (user selectable) | 0.0001 minimum, auto ranging, up to 3 significant digits (user selectable) |
| Relative accuracy (ISE) | ±0.2 mV or ±0.05% of reading, whichever is greater | ±0.2 mV or ±0.05% of reading, whichever is greater |
| Units | ppm, M, mg/L, %, ppb, none | ppm, M, mg/L, %, ppb, none |
| Calibration points | Up to 5 | Up to 5 |
| Calibration editing | Yes | Yes |
| Calibration features | Linear point to point, non-linear selectable auto-blank, low concentration range stability | Linear point to point, non-linear selectable auto-blank, low concentration range stability |
| Range (temperature) | –5 to 105ºC, 23 to 221ºF | –5 to 105ºC, 23 to 221ºF |
| Resolution (temperature) | 0.1ºC, 0.1ºF | 0.1ºC, 0.1ºF |
| Relative accuracy (temperature) | ±0.1ºC, ±0.1ºF | ±0.1ºC, ±0.1ºF |
| Temperature offset calibration | 1 point | 1 point |
| Number of datalogs | 5,000 with time and date stamp | 5,000 with time and date stamp |
| Log function | Manual, ready (includes AUTOREAD), timed | Manual, ready, (includes AUTO-READ), timed |
| pH electrode or ISE | BNC, reference pin | BNC, reference pin |
| Conductivity or ATC probe | 8-pin mini DIN | 8-pin mini-DIN |
| DO probe | 9-pin mini-DIN | -- |
| Outputs | RS232, USB | RS232, USB |
| AC adapter | Optional—universal, 100–240VAC | Optional—universal, 100-240VAC |
| Battery power | Included—4AAs | Included—4 AAs |
| Battery life | 800 hrs | 800 hrs |
| Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories › | ||
Advanced | |
|---|---|
| Eutech ION2700 pH/Ion Bench Meter | |
| | |
| Economical, routine laboratory meters | |
| pH range | –2.000 to 20.000 |
| pH resolution | 0.001 / 0.01 / 0.1 |
| pH calibration points | Up to 6 |
| mV, RmV modes | Yes |
| Ion concentration range | 0.001 to 19900 ppm |
| Ion calibration points | 2 to 8 |
| Range (temperature) | 0.0 to 100.0 °C, 32.0 to 212.0 °F |
| Number of channels | 1 |
| Data log | 500 with date/time |
| Calibration log | Most recent viewable on meter and stored in meter memory |
| Data export options | RS232 |
| Power supply | Universal, 100-240VAC, 50/60 Hz, Cat. No. 60X426401 |
| Premium | Advanced | Basic | |
|---|---|---|---|
| Eutech pH 450 Portable Meter | Eutech pH 620 Portable Meter | Eutech ION 6+ Portable Meter | |
| | | |
| pH range | –2.00 to 16.00 pH | -2.000 to 20.000 pH | 0.00 to 14.00 pH |
| pH resolution | 0.01 pH | 0.1 / 0.01 / 0.001 pH | 0.01 pH |
| pH relative accuracy | ±0.01 pH | ±0.002 pH | ±0.01 pH |
| pH calibration points | Up to 6 | Up to 6 | Up to 3 |
| Range (mV) | ±2000 mV | ±2000 mV | ±500 mV |
| Resolution (mV) | 0.1 mV ±999.9 mV; 1 mV beyond | 0.1 mV | 0.1 mV (±199.9 mV) / 1 mV beyond |
| Relative accuracy | ±0.2 mV +2 LSD or +0.5 % of reading; whichever is greater | ±0.2 mV + 1 LSD | ±0.2 mV / ±2 mV + 1 LSD |
| pH ORP Mode | --- | Yes | Yes |
| Range (ISE) | 0.0 to 2000 ppm | 0.001 to 19900 | 0.01 to 0.99 / 1.0 to 199.9 / 200 to 1999 ppm |
| Calibration points | From 2-4 or 2-5 | Up to 8 | Up to 3 |
| Range (temperature) | -10.0 to 110.0 ºC (14.0 to 230.0 ºF) | -10.0 to 110.0 °C (14.0 to 230.0 °F) | 0.0 to 100.0 ºC |
| Number of datalogs | 500 with time and date stamp | 500 with time and date stamp | --- |
| Data export options | USB or RS232 | RS232C through LED, IrDA | --- |
| AC adapter | 9 V DC adapter, 1.3 A (100/240 VAC, SMPS) (optional) | 9 V DC adapter (500 mA) | --- |
| Battery power | Two AA batteries (included) | Included—(4) AA | 4 x AAA batteries |
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