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Thermo Scientific Orion Star A212 Benchtop Conductivity Meter for Multi-Parameter Water Analysis

UsedThermo Fisher ScientificElectrochemistryUnited States

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Range (Conductivity)
0.001 µS/cm to 3000 mS/cm
Resolution (Conductivity)
0.001 μS minimum, auto ranging up to 4 significant digits
Accuracy (Conductivity)
0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Range (TDS)
0.001 to 200.0 ppm
Resolution (TDS)
0.001 ppm minimum, auto ranging up to 4 significant digits
All 43 specifications
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Specifications 43

Brands
Thermo Fisher Scientific
New/Used
Used
Range (Conductivity)
0.001 µS/cm to 3000 mS/cm
Resolution (Conductivity)
0.001 μS minimum, auto ranging up to 4 significant digits
Accuracy (Conductivity)
0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Range (TDS)
0.001 to 200.0 ppm
Resolution (TDS)
0.001 ppm minimum, auto ranging up to 4 significant digits
Accuracy (TDS)
0.5% of reading ±1 digit
TDS Factor Range
Linear (0.02 to 9.99)
Range (Salinity)
0.06 to 80.00 psu, 0.05 to 42.00 ppt
Resolution (Salinity)
0.01 psu or 0.01 ppt minimum, auto ranging
Accuracy (Salinity)
0.5% of reading ±1 digit
Accuracy (ISE)
±0.2 mV or ±0.05% of reading whichever is greater
Salinity Measurement Modes
Practical salinity (psu) or natural sea water (ppt)
Range (Resistivity)
2 ohm to 100.0 meg-ohm
Resolution (Resistivity)
1 ohm or 0.1 meg-ohm, auto ranging
Accuracy (Resistivity)
0.5% of reading ±1 digit
Compatible Probes
2-cell or 4-cell conductivity sensors with built-in temperature
Temperature Compensation
Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off
Temperature (Metric) Reference
5, 10, 15, 20, 25°C
Calibration
Conductivity with calibration editing option and temperature
Range (Temperature)
-5.0° to 105.0° C, 22.0° to 221.0° F
Resolution (Temperature)
0.1°C, 0.1°F
Accuracy (Temperature)
±0.1°C
Temperature Selection
Manual or automatic with ATC temperature probe
Temperature Probe Calibration
1 point temperature offset calibration
Channels
1
Measurement Modes
Conductivity, TDS, salinity or resistivity with temperature
Stability
Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Data Management Details
Transfer single, range or all data points to printer or computer
Data Points
2000 with date and time stamp
Memory
Non-volatile memory preserves data log, calibration log and meter settings
Alarm Output
High/low limit alarm, calibration due alarm
Methods
10 per channel with password protection
Languages
English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Log Function Type
Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous measure mode
Probe Type
Conductivity sensor, stirrer probe (purchase separately)
Battery Life
800 hours
Temperature Operating
41° to 113°F/ 5° to 45° C (ambient)
Relative Humidity Range
5 to 85 %, non-condensing
Dimensions (L x W x H)
24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
Power
Universal AC adapter (included) or 4 AA batteries (sold separately)
Weight
6 lbs

Product description

Benchtop conductivity meter measuring conductivity, TDS, salinity, resistivity, and temperature with high resolution.

The Thermo Scientific Orion Star A212 is a precision benchtop conductivity meter designed for laboratory measurement of conductivity, total dissolved solids (TDS), salinity, resistivity, and temperature. Suitable for biotechnology and molecular diagnostics laboratories, this instrument supports a broad measurement range from 0.001 µS/cm to 3000 mS/cm with high resolution and automatic ranging, enabling accurate analysis across ultra-pure to high conductivity samples.

Key technical features include:

  • Multi-parameter measurement modes: Conductivity, TDS, salinity (practical and natural seawater modes), resistivity, and temperature
  • Wide measurement ranges and high accuracy: For example, conductivity accuracy at 0.5% of reading ±1 digit and temperature accuracy of ±0.1°C
  • Compatible with 2-cell or 4-cell conductivity sensors featuring built-in temperature compensation supporting linear, nLFn, nLFu, and EP modes for precise readings in various water conditions
  • Data management capabilities: 2000 data points stored with date/time stamps, password-protected methods, alarm outputs, and data transfer via printer or PC
  • Robust calibration system with conductivity calibration editing and temperature probe offset adjustment to maintain measurement reliability critical in bioprocessing and molecular cloning workflows
  • Flexible power options using universal AC adapter or AA batteries for uninterrupted laboratory operation
  • Compact and ergonomic design: Dimensions 24 cm x 18 cm x 11 cm and weight 6 lbs, suitable for benchtop setups in synthetic biology and environmental monitoring labs

This conductivity meter is widely adopted in fields requiring precise water quality characterization such as biotechnology research, biomanufacturing, and clinical diagnostics. Its advanced feature set supports essential applications including molecular biology protocols and bioprocessing quality control. The inclusion of multi-language support and automatic data logging further enhances usability for research professionals focused on fluorescence analysis and live-cell imaging where precise buffer and reagent quality assessment is critical.

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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?

Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options 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 7 November 2026