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Thermo Scientific™ Orion Star™ A122 Conductivity Portable Meter

Take simple conductivity, TDS and temperature measurements with this conductivity portable meter with easy operation for basic field testing.

Supplier:  Thermo Scientific™ STARA1225

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Catalog No. 13-645-512

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Take simple, routine conductivity, total dissolved solids (TDS) and temperature measurements with the Thermo Scientific™ Orion Star™ A122 Conductivity Portable Meter. This instrument, intended for basic conductivity analysis in the field, is easy-to-use and budget-friendly. Obtain temperature compensated readings using linear option with 20°C or 25°C reference temperatures. Quickly navigate setup menus and ensure consistent calibrations using the simple keypad layout and on-screen text prompts. This waterproof meter has an IP67-rated housing for rugged protection in outdoor environments.

Thermo Scientific Orion Star A122 conductivity portable meters are a simple, economical solution for your routine outdoor sample analysis. Featuring an emphasized measure key, selectable read modes and measurement stability indicator, our basic Orion Star A122 conductivity meters are designed to deliver measurements you can trust at an affordable price.

  • Measure conductivity or TDS with temperature
  • Perform a one point automatic or manual calibration 
  • Auto-ranging conductivity values offer consistent readings across entire measurement range
  • Use linear temperature compensation with 20°C or 25°C reference temperatures
  • Simplified, easy-to-read display shows main measurement with temperature, stability indicator and electrode condition icon
  • User-friendly operation with basic calibration text prompts 
  • Easily recall calibration data for procedure checks 
  • Non-volatile memory preserves 50 point internal data log and meter settings, even with loss of power
  • Flexible power options with AA batteries or optional universal power adapter 
  • IP67-rated housing is waterproof for rugged field operation 
  • Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand 
  • Meters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty


Orion Star A122 conductivity/TDS portable meter kit with 2-cell conductivity sensor, solutions, meter armor and field case
Conductivity, TDS with Temperature
0.001 to 10cm-1
0.01 μS minimum, auto ranging up to 3 significant digits
20, 25°C
1 mg/L
Linear (0.02 to 9.99)
0.1°C (0.1°F)
Manual or automatic with ATC temperature probe
Internal data point memory
CE, TUV 3-1, FCC Class A
Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
0.5 kg
3 Year Meter
5 to 85%, non-condensing
4 AA batteries (included) or universal AC adapter (sold separately)
Simple with highlighted measure key, scroll and shortcut keys
41°F to 113°F (ambient)
2000 hr.
0.5% of reading ±1 digit
Star A122 conductivity meter, 011050MD Orion 2-cell conductivity sensor, 011007 Orion 1413 µS conductivity standard, protective meter armor, hard-sided field case, 4 AA batteries, literature CD, printed quick start guide and meter test certificate
2-cell or 4-cell conductivity sensors with built-in temperature
Conductivity and temperature
0.01 μS/cm to 200.0 mS/cm
1 to 19,999 mg/L
0.5% of reading ±1 digit
-5°C to +105°C
1 point temperature offset calibration
Non-volatile memory preserves log and settings
Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
8 pin MiniDIN (conductivity sensor with built-in temperature)
24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
2 lb.
Conductivity sensor (includes 011050MD Orion 2-cell conductivity sensor)
Orion Star A122 Conductivity/TDS/Temperature Portable Meter
Smart Stability and Smart Averaging
5°C to 45°C (ambient)
4 x AA (included)




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