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Thermo Scientific Orion Star A122 Portable Conductivity and TDS Meter with Temperature Compensation

UsedThermo Fisher ScientificConductivity metersUnited States

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Accuracy (Conductivity)
0.5% of reading ±1 digit
Measurement Modes
Conductivity, Total Dissolved Solids, Temperature
Range (Conductivity)
0.01µS/cm to 200.0 mS/cm
Resolution (Conductivity)
0.01 μS minimum, auto ranging up to 3 significant digits
Range (TDS)
1 to 19,999 mg/L
All 18 specifications
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Specifications 18

Brands
Thermo Fisher Scientific
New/Used
Used
Accuracy (Conductivity)
0.5% of reading ±1 digit
Measurement Modes
Conductivity, Total Dissolved Solids, Temperature
Range (Conductivity)
0.01µS/cm to 200.0 mS/cm
Resolution (Conductivity)
0.01 μS minimum, auto ranging up to 3 significant digits
Range (TDS)
1 to 19,999 mg/L
Resolution (TDS)
1 mg/L
Accuracy (TDS)
0.5% of reading ±1 digit
Temperature Reference
20°C, 25°C
Temperature Compensation
Linear
Temperature Range
-5°C to +105°C
Accuracy (Temperature)
±0.1°C
Display
LCD
Data Points stored
50
Dimensions
9x4x3”
Weight
Weight
Electrical
120v Or 4xAA Batteries

Product description

Portable Orion Star A122 meter with conductivity, TDS, and temperature measurement; IP67 waterproof, 0.5% accuracy.

The Thermo Scientific Orion Star A122 is a portable conductivity meter designed for precise measurement of conductivity, total dissolved solids (TDS), and temperature with temperature compensation at 20°C or 25°C reference points. It features:

  • Measurement ranges: Conductivity from 0.01 µS/cm to 200.0 mS/cm; TDS from 1 to 19,999 mg/L
  • Resolution and accuracy: Conductivity resolution down to 0.01 µS/cm with 0.5% reading ±1 digit accuracy; TDS accuracy also at 0.5% reading ±1 digit
  • Temperature measurement: Range from -5°C to 105°C with ±0.1°C accuracy, utilizing linear temperature compensation
  • Display: Easy-to-read backlit LCD with on-screen guidance for user-friendly operation
  • Data storage: Stores up to 50 data points for efficient field data management
  • Power options: Operates on 4 AA batteries or via 120V electrical supply, supporting portability
  • Durability: IP67 rated for waterproof protection, making it suitable for demanding lab and field environments

This handheld conductivity meter is widely used in biotechnology, molecular diagnostics, and bioprocessing applications that require accurate monitoring of ionic concentration and TDS during sample preparation and synthetic biology workflows. Its portability and rugged design make it critical in biopharmaceutical production pipelines and environmental monitoring often integrated within research laboratories focusing on cell imaging and clinical diagnostics.

The Orion Star A122's precise temperature compensation and broad measurement range render it essential for molecular cloning workflows and various life science applications where reliable conductivity and TDS measurements influence experimental integrity.

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Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Yes. Every verified supplier states which service partners cover the instrument, and we list that alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.

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Last updated 19 October 2026