Dual parameter meters designed for your routine field ion measurements

Take your measurements outdoors. Take your pH and ion concentration (ISE) measurements in the field without sacrificing accuracy and reliability. Thermo Scientific Orion Star A320 series of portable pH and ISE meters offer a rugged, waterproof design for dependable performance on location.

 

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  Orion Star A329 pH/ISE
(STARA3290 series)
Orion Star A324 pH/ISE
(STARA3240 series)
  Premium portable Ion specific ISE meters Advanced portable Ion specific ISE meters
  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 ›

Complete your ISE measurements faster

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

ISE Benchtop Meters

benchtop Ion specific ISE meters

Experience the same dependable performance you value in the field in your lab. We offer a wide range of benchtop ISE meters for your measurement needs, performance specifications, and budgetary constraints.

Electrodes & Probes

electrodes for use with Ion specific ISE meters

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.

Buffers and Solutions

buffers and solutions for use with Ion specific ISE meters

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.


Choose the best electrode for your application

This interactive Orion electrode selection guide will help you to find the perfect electrode for your application based on your requirements.

Find your electrode


Resources
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.

Find your software