Orion Star A322 Conductivity Portable Meter

  • High Range Conductivity Applications Conductivity measurement range from 0.001 mS to 3000 mS
  • Non-Volatile Memory Memory capacity to store up up 5000 time and date stamped data points
  • Warranty A322 Conductivity Meter comes with a 3 year replacement meter warranty
  • TDS & Salinity
Product Options


The Orion A322 Portable Conductivity Meter is the perfect option if advanced conductivity, TDS and salinity measurement are required on location. The large backlit graphic LCD clearly displays conductivity/TDS/salinity resistivity and temperature.

The Star A322 conductivity meter features extras such as stability and averaging options with additional options allowing for laboratory accuracy in any location. Linear, non-linear, nLFu or EP curve options are available with reading reference temperatures of 5, 10, 15, 20 or 25°C for advanced accuracy. There is the option to choose either practical salinity or natural sea water curves to gather salinity readings. Linear or ISO/EN 27888 curves for TDS are also available. Additional features are user ID and calibration points, electrode status, sample ID, time and date. Multilanguage options in English, Spanish, French, Italian, German and Chinese are standard along with selectable cell constant allows for use with 2 or 4 cell conductivity cells.

The Orion A322 Portable Conductivity Portable Meter has the capacity to hold up to 5000 data points logging time and date, the AUTO-READ™ feature locks stable readings and the ready alert indicator highlights when readings are stable. Timed reading records data at specific time intervals.

Standard features with the A322 Portable Conductivity Meter include IP67-rated housing, waterproof protection, and the ability to run on batteries which provide over 800 hours of operation or through a universal power adapter which can be purchased separately. Data is easily transferred and up-to-date software can be sought using the USB and RS232 ports as well as data analysis software.

The Orion A322 Portable Conductivity Meter is covered by a 3 year replacement warranty.

Manufactured by: Thermo Scientific
Model: Orion Star A322 Conductivity Portable Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


High range conductivity monitoring


Range 0.001 µS to 3000 mS
Resolution 0.001 µS minimum;
4 significant figures minimum
Relative Accuracy 0.5 % reading ±1 digit
Reference Temperature 5, 10, 15, 20, 25 °C
Temperature Compensation Linear (0 to 10.0 %/°C),
nLn, nLFu, EP
Compatible Cell Constants 0.001 to 199.9
Calibration Points Up to 5 points
Calibration Editing Yes
Range 2 ohm to 100 meg-ohm
Resolution 2 ohms-cm
Relative Accuracy 0.5 % reading ±1 digit
Type Practical salinity or
natural sea water
Range 0.01 to 80.0 ppt NaCl
equivalent; 0.01 to 42 ppt
practical salinity
Resolution 0.01
Relative Accuracy ±0.1
Range 0 to 200 ppt
Resolution 4 significant digits
Relative Accuracy ±0.5 % reading ±1 digit
TDS Factor Range Linear 0.01 to 10.00
Range -5 to 105 °C, 23 to 221 °F
Resolution 0.1
Relative Accuracy ±0.1
Offset Calibration 1 point
Number of Points 2000 with time and date stamp
Log Function Manual, ready (includes
AUTO-READ™), timed
Log Edit Delete individual points, group of points or all
Conductivity with Temperature Probe 8-pin mini-DIN
Output RS232, USB
AC Adapter Optional
universal, 100-240 VAC
Battery Power Included 4 AAs
Battery Life 800 hrs


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