Thermo Orion Star A122 Portable Conductivity Meter

The Thermo Orion Star A122 portable conductivity meter combines simplicity and accuracy for both lab and field conductivity readings.


  • Displays conductivity and TDS readings using Orion 8-pin mini-DIN electrodes
  • AUTO-READ function alerts user and locks on-screen readings when stable
  • IP67 waterproof rating, 3-year warranty
List Price $741.00
Starting At $689.13
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Thermo Orion Star A122 Portable Conductivity Meter
The waterproof, battery-operated Thermo Orion Star A122 portable conductivity meter stands up to the most demanding field applications and delivers over 2,000 hours of continuous operation. The meter can be calibrated manually or automatically using Thermo conductivity standards to make the setup process easy.

The rugged, user-friendly meter displays conductivity, TDS and temperature readings on a large LCD screen, while icons provide quick updates on battery life, electrode status and calibration information. Simple button layout and on-screen messages simplify calibration and explain setup menu choices.
  • AUTO-READ function to alert user and lock on-screen readings when stable
  • Selectable cell constant
  • Selectable reading reference temperatures of 20 C or 25 C to increase accuracy
  • Non-volatile memory holds up to 50 data points
  • Electrode arm and newly-designed probe holder to place probes into samples
  • Universal power supply or battery power option
  • IP67-rated housing (may be immersed for up to one hour with no water incursion)
  • 3 year meter warranty
  • Conductivity
  • Range: 0.1 uS/cm to 200 mS/cm
  • Resolution: Min 0.01 uS or 3 significant figures
  • Relative Accuracy: 0.5% reading +/-1 digit
  • Reference: 20, 25 C (default)
  • Compensation: Linear (0.0 to 10.0 %/C)
  • Compatible Cell Constants: 0.0001 to 10
  • Number of Calibration Points: 1
  • TDS
  • Range: 1 to 19,999 mg/L
  • Resolution: 4 significant figures
  • Relative Accuracy: 0.5% reading +/-1 digit
  • TDS Factor Range: Linear 0.01 to 10.00, default 0.49
  • Temperature
  • Range: -5 to 105 C
  • Resolution: 0.1
  • Relative Accuracy: +/-0.1 C
  • Offset Calibration: Yes
  • Datalogging
  • Number of Points: 50
  • Log Function: Manual, Automatic with AUTO-READ
  • Log Edit: Delete last reading or all
  • General
  • Display: Custom LCD
  • Inputs: 8-pin mini-DIN
  • Power Adapter: Universal AC, 100-240 VAC
  • Battery Power: 4 AAs, 2000 hrs life
  • Environmental Requirements: 5 to 45 C and 5 to 85% relative humidity, non-condensing
  • Regulatory and Safety: CE, TUV 3-1, FCC Class A
  • IP Rating: IP67, splashproof and dustproof
  • Warranty: 36 months (from date of purchase)
Questions & Answers
Does the Star A112 Benchtop Meter have better accuracy than the A122 portable meter?

No, both meters feature the same accuracy for all measurements. They feature the same battery life and optional power supply as well. The main difference is the waterproof rating as the portable A122 meter has a higher rating of IP67.

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Thermo Orion Star A122 Portable Conductivity Meter
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