Take your conductivity measurements outdoors

Our Thermo Scientific Orion portable meters are built rugged and waterproof for dependable performance, anywhere, anytime. Take advantage of one-hand operation and easy portability for any remote application without sacrificing accuracy and the reliability of your measurements. Identify the best match based on your required features, performance specifications, and budget.

Which portable conductivity meter is right for you?

 

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Basic

  Orion Star A322 Conductivity
Portable Meters

(STARA3220 series)
Orion Star A222 Conductivity
Portable Meters

(STARA2220 series)
Orion Star A122 Conductivity
Portable Meters

(STARA1220 series)
  Premium portable conductivity measurement meters Advanced portable conductivity measurement meters Basic portable conductivity measurement meters
  Field meters Easy to use, dependable field meters Budget-friendly, simplified field meters
Ideal for
applications in:
Contract testing, environmental, food and beverage, industrial Contract testing, environmental, food and beverage, industrial Education, environmental
Range (conductivity) 0.001 μS to 3000 mS 0.001 μS to 3000 mS 0.01 μS/cm to 200.0 mS/cm
Resolution (conductivity) 0.001 μS minimum, auto ranging, up to 4 significant digits 0.001 μS minimum, auto ranging, up to 4 significant digits 0.01 μS minimum, auto ranging, up to 3 significant digits
Relative accuracy (conductivity) 0.5% of reading ±1 digit > 3 μS, 0.5% of reading ±0.01 μS ≤ 3 μS 0.5% of reading ±1 digit > 3 μS, 0.5% of reading ±0.01 μS ≤ 3 μS 0.5% reading ±1 digit
Calibration points (conductivity) Up to 5 points Up to 5 points 1
Calibration editing (conductivity) Yes -- --
Range (resistivity) 2 ohm to 100 meg-ohm 2 ohm to 100 meg-ohm --
Resolution (resistivity) 1 ohm or 0.1 meg-ohm 1 ohm or 0.1 meg-ohm, auto-ranging --
Relative accuracy (resistivity) 0.5 % reading ±1 digit 0.5 % reading ±1 digit --
Type (salinity) Practical salinity or natural sea water Practical salinity --
Range (salinity) 0.06 to 80.00 psu, 0.05 to 42.00 ppt 0.06 to 80.00 psu --
Resolution (salinity) 0.01 psu, 0.01 ppt 0.01 psu --
Relative accuracy (salinity) 0.5% reading ±1 digit 0.5% reading ±1 digit --
Range (TDS) 0.001 to 200.0 ppt 0.001 to 200.0 ppt 0 to 19999 mg/L
Resolution (TDS) 0.001 ppt minimum, auto ranging, 0.001 ppt minimum, auto ranging, up to 4 significant digits 1 mg/L
Relative accuracy (TDS) ±0.5% reading ±1 digit ±0.5% reading ±1 digit 0.5% reading ±1 digit
Factor range (relative accuracy (TDS)) Linear 0.02 to 9.99 Linear 0.02 to 9.99 Linear 0.01 to 10.00
Range (temperature) -5 to 105ºC, 23 to 221ºF -5 to 105ºC, 23 to 221ºF -5 to 105ºC, 23 to 221ºF
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
Offsite calibration (temperature) 1 point 1 point Yes
Number of datalogs 5000 with time and date stamp 1000 with time and date stamp 50
Log function Manual, ready (includes AUTOREAD), timed Manual, automatic with AUTO-READ Manual, automatic with AUTO-READ
Inputs (conductivity probe with built-in temperature) 8 pin mini DIN 8-pin mini-DIN 8-pin mini-DIN
Outputs (conductivity probe with built-in temperature) RS232, USB RS232, USB --
AC adapter Optional—universal, 100–240 VAC Optional—universal, 100–240 VAC Optional—universal, 100–240 VAC
Battery power included—(4) AA included—(4) AA included—(4) AA
Battery life 800 hrs 800 hrs 2,000 hrs
  Enhance your productivity with accessories for your benchtop and portable meters. Meter Accessories ›

View our complete conductivity measurement portfolio

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

Benchtop Conductivity Meters

benchtop condutivity meters

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

Electrodes and
Probes

electrodes for use with conductivity meters

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.

Buffers and
Solutions

buffers and solutions for use with conductivity meters and electrodes

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.

Choose the right pH meter for your lab

This interactive Orion pH Meter Selector Tool will help guide you to the ideal Thermo Scientific Orion benchtop or portable meter and accessories based on your requirements. 

Find your meter

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