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Thermo Scientific™ Orion Star™ A322 Conductivity Portable Meter

Accurately monitor conductivity, TDS, salinity, resistivity and temperature with this conductivity portable meter designed for challenging field tests.

Supplier:  Thermo Scientific™ STARA3225

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Catalog No. 13-645-556



Get high accuracy and premium performance everywhere you need it with the Thermo Scientific™ Orion Star™ A322 Conductivity Portable Meter. This instrument is designed for a wide range of conductivity, total dissolved solids (TDS), salinity, resistivity and temperature testing and field applications. Evaluate samples in the most demanding locations using this waterproof meter with IP67-rated housing. Select linear, non-linear pure water or EP temperature compensation with 5°C, 10°C, 15°C, 20°C or 25°C reference temperatures. Log up to 5000 data point sets with time/date stamp and transfer to a printer or computer.

Take your measurements at the source with our premium line of portable meters. The Thermo Scientific Orion Star A322 conductivity portable meter offers an information-rich screen and user-friendly operation. This rugged, waterproof portable meter is ready to tackle the elements with you. Orion Star A322 conductivity portable meters are designed to be easy-to-use, dependable field meters that offer advanced features and functions including a 5000 point date log with sample ID and user ID options, calibration and high/low limit alarms and password-protected measurement methods.
  • Measure conductivity, TDS, salinity or resistivity with temperature
  • Perform up to a five point conductivity calibration with calibration editing option that allows individual points to be fixed without a full recalibration
  • Auto-ranging conductivity values offer consistent readings across entire measurement range without need to recalibrate
  • Use linear, non-linear, EP (USP) or off conductivity temperature compensation with 5°C, 10°C, 15°C, 20°C or 25°C reference temperatures
  • Informative, easy-to-read backlit graphic display with clear onscreen instructions simplifies operation
  • Capture your critical readings with measurement stability indicator and selectable read modes – Auto-Read holds a stable reading, Continuous shows changing readings with hold option and Timed logs data at specific intervals
  • Data log collects and date/time stamps up to 5000 measurement sets with optional sample ID and user ID
  • Calibration log stores ten most recent calibrations
  • Non-volatile meter memory ensures your data and settings are protected, even with loss of power
  • Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
  • Flexible power options with AA batteries or optional universal power adapter
  • IP67-rated housing is waterproof for rugged field operation
  • Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand
  • Meters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty


USB, RS232
0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Conductivity, TDS, Salinity, Resistivity with Temperature
0.001 to 199.9cm-1
0.001 μS minimum, auto ranging up to 4 significant digits
5, 10, 15, 20, 25°C
0.01 psu or 0.01 ppt minimum, auto ranging
Practical salinity (psu) or natural sea water (ppt)
0.5% of reading ±1 digit
-5°C to +105°C
Manual or automatic with ATC temperature probe
Graphic LCD with Backlight
Non-volatile memory preserves data log, calibration log and meter settings
Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
High/low limit alarm, calibration due alarm
CE, TUV 3-1, FCC Class A
Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
0.5 kg
3 Year Meter
5 to 85%, non-condensing
1 ohm or 0.1 megohm, auto ranging
10 per channel with password protection
Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
41°F to 113°F (ambient)
4 x AA (included)
Orion Star A322 conductivity/TDS/salinity/resistivity portable meter kit with DuraProbe 4-cell conductivity sensor, solutions, meter armor and field case
Star A322 Conductivity Meter with Batteries; 013010MD DuraProbe Epoxy 4-Probe (K=0.475) Conductivity Probe with 3 Meter Cable; 01100710 Conductivity 1413uS Standard Pouches; 911110 Rinse Solution Pouches; STARA-CS Star A Meter Hard Carrying Case; instructions and batteries
2-cell or 4-cell conductivity sensors with built-in temperature
Conductivity with calibration editing option and temperature
0.001 μS/cm to 3000 mS/cm
Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off wit
0.06 to 80.00 psu, 0.05 to 42.00 ppt
0.5% of reading ±1 digit
0.001 ppm minimum, auto ranging up to 4 significant digits
Linear (0.02 to 9.99)
0.1°C (0.1°F)
2 ohm to 100.0 megohm
1 point temperature offset calibration
Yes, selectable
5000 with date and time stamp
Transfer single, range or all data points to printer or computer
8 pin MiniDIN (conductivity sensor with built-in temperature)
24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
1.2 lb.
Conductivity sensor (includes 013010MD Orion DuraProbe 4-cell conductivity sensor)
Orion Star A322 Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter
4 AA batteries (included) or universal AC adapter (sold separately)
Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
5°C to 45°C (ambient)
0.5% of reading ±1 digit
800 hr.