A212 Conductivity Benchtop Meter

A212 Conductivity Benchtop Meter

  • IP54 Rated Housing Capable of withstanding splashes
  • Warranty This product comes complete with a three year replacement warranty
  • User Friendly Simple screen prompts
Product Options


The Orion Star™ A212 Conductivity Meter features selectable cell constant enabling use with two or four conductivity cells along with selectable reading reference temperatures of 5, 10, 15, 20 or 25° with linear, nonlinear, nLFu or EP curve options all for the purpose of gathering accurate results. Linear or ISO/EN 27888 curves for TDS and a choice of practical salinity or natural sea water curves for salinity readings.

There are many other additional features which make the Thermo Scientific™ Orion Star™ A212 Conductivity Meter the perfect choice for taking simple readings and these are:

  • Plain language screen prompts
  • Soft keys that update for easy selection
  • Multilanguage interface supports English, Spanish, French, Italian, German and Chinese
  • Electrode arm and newly designed probe holder for easy maintenance and placement of probes into samples
  • Wall mounting option to save bench space
  • Warranty - This item is covered by a three year replacement warranty

Manufactured by: Thermo Scientific
Model: A212 Conductivity Benchtop Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Accuracy (Conductivity) 0.5% of reading ±1 digit
Accuracy (Resistivity) 0.5% of reading ±1 digit
Accuracy (Salinity) ±0.1ppt
Accuracy (TDS) 0.5% of reading ±1 digit
Battery Life 800 hours
Battery Type Four AA (sold separately)
Calibration Points Up to 5
Cell Constant 0.001 to 199.9cm¹
Compatible Probes 2-cell or 4-cell conductivity with built in temperature
Data Points 2000
Description Orion Star A212 Conductivity/TDS/Resistivity/Salinity/Temperature Benchtop Meter
Display Type Graphic LCD with backlight
Hertz 50/60Hz
Inputs 8-pin Mini-DIN (conductivity with temperature probe), stirrer input
Log Edit Type Delete individual points, delete group of points or delete all
Log Function Type Manual, ready (includes AUTO-READ), timed
Outputs USB, RS232
Power Supply Universal 90-260 VAC (included)
Range (Conductivity) 0.001 µS/cm to 3000 mS/cm
Range (Resistivity) 2 ohm to 100 meg-ohm
Range (Salinity) 0.01 to 80.0 ppt NaCl equivalent; 0.01 to 42 ppt practical salinity
Range (TDS) 0 to 200ppt
Relative Humidity Range 5 to 85 %, non-condensing
Resolution (Conductivity) 0.001 µS minimum, 4 significant digits minimum
Resolution (Resistivity) 2ohms-cm
Resolution (Salinity) 0.01ppt
Resolution (TDS) 4 significant digits
Sensor Types 2-cell or 4-cell conductivity probe - purchase separately
Accuracy (Temperature) ±0.1°C
Temperature Compensation Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off
Range (Temperature) -5 to 105°C
Resolution (Temperature) 0.1°C
Voltage 90 to 260VAC
Warranty 3 year meter replacement
Salinity Measurement Modes Practical salinity or natural sea water (NaCl equivalent)
TDS Factor Range Linear 0.01 to 10.00
Certifications/Compliance IP-54
Temperature (Metric) Reference 5, 10, 15, 20, 25°C


Total dissolved solids (TDS) is a measure of the combined inorganic and organic substances dissolved in water. It is directly related to the electrical conductivity of water and as such can be used as an indication of change.
TDS is only relevant in freshwater systems as salinity will dramatically increase the conductivity and therefore apparent TDS.