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Thermo Scientific™ Orion Star™ A122 Conductivity Portable Meter

Take simple conductivity, TDS and temperature measurements with the Thermo Scientific™ Orion™ Star A122 Conductivity Portable Meter with easy operation for basic field testing

Manufacturer:  Thermo Scientific™ ORISTARA1220

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Catalog No. 13-645-510



Take simple, routine conductivity, total dissolved solids (TDS) and temperature measurements with the Thermo Scientific™ Orion™ Star A122 Conductivity Portable Meter, an easy-to-use and budget-friendly instrument for basic conductivity analysis in the field. Obtain temperature compensated readings using linear option with 20 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 combine simplicity with accuracy. A large LCD displays conductivity or TDS readings along with temperature. Icons provide quick updates on battery life and completed calibration status. Simple button layout and onscreen messages help with calibration and setup menu choices
  • Large, informative screen clearly shows the main information, including conductivity or TDS reading, temperature in °C or °F, meter mode and battery life
  • Don't miss a reading - AUTOREAD™ locks in the stable reading on your screen and ready indicator alerts when readings are stable
  • Selectable cell constant Manual calibration or automatic calibration when using a Thermo Scientific Orion conductivity standard (sold separately)
  • Selectable reading reference temperatures of 20°C or 25°C for an accurate result
  • Non-volatile memory holds up to 50 data points
  • Four AA batteries (included) provide over 2000 hours of operation or purchase the universal power adapter (sold separately) to run meter on AC power
  • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing
  • 3 year meter replacement warranty


Orion Star A122 conductivity/TDS portable meter
Orion Star A122 Conductivity/TDS/Temperature Portable Meter
Star A122 conductivity meter, 4 AA batteries, literature CD, printed quick start guide and meter test certificate
0.01 μS minimum, auto ranging up to 3 significant digits
1 to 19999mg/L
0.5% of reading ±1 digit
2-cell or 4-cell conductivity sensors with built-in temperature
20, 25°C
0.1°C, 0.1°F
Manual or automatic with ATC temperature probe
Simple with highlighted measure key, scroll and shortcut keys
Smart Stability and Smart Averaging
Non-volatile memory preserves log and settings
8 pin MiniDIN (conductivity sensor with built-in temperature)
Conductivity sensor (purchase separately)
Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Four AA (included)
CE, TUV 3-1, FCC Class A
5° to 45° C (ambient)
24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)
3 year meter warranty
Orion Star A122 conductivity/TDS portable meter
0.01 µS/cm to 200.0 mS/cm
0.5% of reading ±1 digit
Linear (0.02 to 9.99)
Conductivity and temperature
-5.0° to 105.0° C, 22.0° to 221.0° F
1 point temperature offset calibration
Conductivity or TDS with temperature
Internal data point memory
Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
4 AA batteries (included) or universal AC adapter (sold separately)
2000 hours
41° to 113°F (ambient)
5 to 85 %, non-condensing
2 lb.
0.001 to 10cm-1