A112 Conductivity Benchtop Meter

A112 Conductivity Benchtop Meter

  • Accurate Perfect for taking simple conductivity measurements
  • Easy to Use Clear, informative screen and simple button layout
  • Warranty This product comes complete with a three year warranty
Product Options


The A112 Conductivity Benchtop Meter is very easy to use, a handy large screen displays on screen messages which help with calibration and setup menu choices. This particular meter features a selectable cell constant as well as selectable reading reference temperatures of 20 or 25°C to ensure accurate results.

The Large informative screen clearly shows all relevant information including conductivity or TDS reading, temperature, meter mode and power source. Thermo Scientific™ AUTO-READ™ ensures stable readings are locked in, whilst the ready indicator alerts when readings are stable.

There are many other features which make the Thermo Scientific™ Orion Star™ A112 Conductivity Meter the perfect meter for simple measurements and these are:

  • IP54 rated housing which withstands splashes
  • A non-volatile memory capable of holding up to 50 data points
  • A three year replacement warranty
  • Meter supplied with universal power adapter, or can be powered using four AA batteries to run the meter on DC power
  • Included electrode arm and newly designed holder make it easier to maintain and place probes into samples
  • Meter can easily be wall mounted, saving bench space

Manufactured by: Thermo Scientific
Model: A112 Conductivity Benchtop Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Accuracy (Conductivity) 0.5% of reading ±1 digit
Accuracy (TDS) 0.5% of reading ±1 digit
Battery Life 2000 hours
Battery Type Four AA (sold separately)
Calibration Points 1
Cell Constant 0.001 to 10cm¹
Compatible Probes 2–cell or 4–cell conductivity with built in temperature
Data Points 50
Description Orion Star A112 Conductivity/TDS/Temperature Benchtop Meter
Display Type LCD
Hertz 50/60Hz
Inputs 8–pin Mini–DIN (conductivity with temperature probe)
Log Edit Type Delete last point or delete all
Log Function Type Manual, automatic with AUTO-READ
Outputs None
Power Supply Universal 90–260 VAC (included)
Range (Conductivity) 0.1 µS/cm to 200 mS/cm
Range (TDS) 1 to 19999mg/L
Relative Humidity Range 5 to 85 %, non–condensing
Resolution (Conductivity) 0.01 µS minimum, 3 significant digits minimum
Resolution (TDS) 4 significant digits
Sensor Types 2–cell or 4–cell conductivity probe - purchase separately
Accuracy (Temperature) ±0.1°C
Temperature Compensation Linear
Range (Temperature) –5 to +105°C
Resolution (Temperature) 0.1°C
Voltage 90 to 260VAC
Warranty 3 year meter replacement
TDS Factor Range Linear 0.01 to 10.00
Certifications/Compliance IP-54
Temperature (Metric) Reference 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.