• Multiparameter Benchtop Meter

Multiparameter Benchtop Meter

pH/ISE/Conductivity/Dissolved Oxygen

  • Offer interchangeable measurement modules
  • Modules available for pH, ISE, Conductivity, RDO/DO...
  • Data log collects up to 2000 data points with time and date stamp

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Versatile, High-Performance Laboratory Measurement System

Thermo Scientific Orion Versa Star benchtop meters are designed to meet your most challenging application with ease. Delivering rich functionality and features, you can optimally configure your meter system to meet changing requirements. The Orion Versa Star benchtop meters offer interchangeable measurement modules that allow multiple users to customize four separate channels to meet their specific requirements.

Easily view your measurements on a stunning color display with adjustable text sizes. Take the guesswork out of meter calibration and setup with onscreen instructions available in a variety of local
languages. Enjoy quick and simple data entry using the numeric keypad.

Collect, store, and export your critical data:

  • „„Data log collects up to 2000 data points with time and date stamp; enhance data tracking using electrode ID, sample ID and user ID options
  • „„Calibration log stores ten most recent calibrations per parameter with viewable graph for multipoint pH and ISE calibrations
  • „„Ensure measurement integrity by viewing the active calibration log while taking readings
  • „„Non-volatile memory preserves data and settings, even in the event of power loss
  • „„Free Orion Star Com software facilitates data transfers to a computer via USB or RS232 connections

Premium ease-of-use features:

  • „Onscreen measurement stability indicator lets you know exactly when your measurements are ready and is adjustable using custom stability and averaging settings
  • „„Audible alarms automatically notify you when a set offset value, high/low limit value, and calibration time interval are reached
  • „„Easily access, update and switch your preferred measurement settings, using ten password-protected methods per channel
  • „„Uniformly mix solutions using meter-controlled stirrer probes that are easy to position and can be quickly rinsed between samples

Measurement Modules

Select the measurement modules you need to best fit your application requirements.

The Versa Star meter is available without modules (VSTAR00),providing maximum flexibility for your meter configuration.


Versa Star pH Module measures pH, mV, relative mV, ORP and temperature


Versa Star pH/LogR Module measures pH, mV, relative mV, ORP and LogR temperature


Versa Star pH/ISE Module measures pH, ion concentration (ISE),mV, relative mV, ORP and temperature


Versa Star Conductivity Module measures conductivity, TDS, salinity, resistivity and temperature


Versa Star RDO/DO Module measures dissolved oxygen using an RDO optical or polarographic DO probe and temperature


Versa Star Meter Without Modules includes electrode stand, universal power adapter and computer interface cable

Many configurations, electrodes, consumables and accessories available on request.

Range (pH)-2.000 to 20.000pH
Resolution (pH)0.1, 0.01, 0.001pH
Accuracy (pH)±0.002pH
Range (mV)±2000.0mV
Range (Relative mV)±2000.0mV
Range (ORP)±2000.0mV
Resolution (mV)0.1mV
Accuracy (mV)±0.2 mV or ±0.05% of reading whichever is greater
Range (ISE)0.0001 to 19990 with selectable units of ppm, Molar, mg/L, %, ppb or none
Resolution (ISE)0.0001 minimum, 1 to 4 significant digits (user selectable)
Accuracy (ISE)±0.2 mV or ±0.05% of reading whichever is greater
Advanced ISE FunctionsSegmented (point-to-point) slope, non-linear selectable auto-blank, low concentration range stability, incremental techniques including single known addition and subtraction, double known addition and subtraction, single analyte addition and subtraction
Isopotential Point7.000pH (adjustable),1.000 ISE (adjustable)
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 RangeLinear (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
Salinity Measurement ModesPractical 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
Cell Constant0.001 to 199.9cm-1
Temperature CompensationLinear, nLFn (non-linear ultra pure water),nLFu (non-linear ultra pure degassed water),EP (off with warning) or off
Temperature Reference5, 10, 15, 20, 25°C
Range (Polarographic DO)0.00 to 90.00mg/L
Resolution (Polarographic DO)0.01, 0.1mg/L
Accuracy (Polarographic DO)±0.2mg/L or ±2% of reading, whichever is greater
Range (RDO)0.00 to 50.00mg/L
Resolution (RDO)0.01, 0.1mg/L
Accuracy (RDO)±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, ±10% of reading up to 50mg/L
Percent Saturation Range (Polarographic DO)0.0 to 600.0 % saturation
Percent Saturation Resolution (Polarographic DO)0.1, 1 % saturation
Percent Saturation Relative Accuracy (Polarographic DO)±2 % saturation or ±2% of reading whichever is greater
Percent Saturation Range (RDO)0.0 to 500.0 % saturation
Percent Saturation Resolution (RDO)0.1, 1 % saturation
Percent Saturation Relative Accuracy (RDO)±2 % saturation ≤ 200 % saturation, ±10 % saturation > 200 % saturation
Barometric Pressure Correction400 to 850mmHg, automatic using built-in barometer or manual entry
Pressure Range400 to 850mmHg
Pressure Resolution0.1mmHg
Accuracy (Barometer)±6mmHg
Salinity Factor0.0 to 45.0 ppt, automatic correction using conductivity reading or manual entry of sample salinity
CalibrationpH with calibration editing option, ion concentration (ISE) with calibration editing option, relative mV (RmV),ORP, conductivity with calibration editing option, dissolved oxygen and temperature
Calibration Points (pH)1 to 6
Calibration Points (ISE)1 to 6
Calibration Points1 point relative mV (RmV) mode, 1 point ORP mode
Calibration Points (Conductivity)Up to 6
Calibration ModesWater-saturated air, air-saturated water, manual (Winkler titration),zero point
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 SelectionManual or automatic with ATC temperature probe
Temperature Probe Calibration1 point temperature offset calibration
Channels4 - customizable with modules
Display TypeColor graphic LCD with user-customizable options
Backlight OptionYes
KeypadNumeric with menu-specific function keys and dual purpose scroll/shortcut keys
Measurement ModespH, mV, relative mV (RmV),ORP or ion concentration (ISE) with temperature; conductivity, TDS, salinity or resistivity with temperature; dissolved oxygen as % saturation or mg/L with temperature and barometric pressure
StabilitySelectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Data Management DetailsTransfer single, range or all data points to printer or computer
Data Points2000 with date and time stamp
Log Function TypeAutomatic data logging with Auto-Read, Timed and Single Shot measure modes; manual data logging with Continuous measure mode
MemoryNon-volatile memory preserves data log, calibration log and meter settings
Alarm OutputSet point alarm, high/low limit alarm, calibration due alarm
Methods10 per channel
LanguagesEnglish, Spanish, French, Italian, German, Chinese, Portuguese and Korean
InputsBNC (pH or ISE),8-pin Mini-DIN (temperature),reference pin-tip, 8-pin Mini-DIN (conductivity with temperature probe),9-pin Mini-DIN (RDO or polarographic DO with temperature probe),2 stirrer inputs
OutputsUSB (2),RS232
Power SupplyUniversal AC adapter (included)
AC AdapterUniversal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR)
IP RatingIP-54
Certifications/ComplianceCE, TUV 3-1, FCC Class A
Operating Temperature41° to 113°F (ambient)
5° to 45° C (ambient)
Relative Humidity Range5 to 85 %, non-condensing
Dimensions (L x W x H)28cm x 24cm x 10cm (11 in. x 9.5 in. x 3.9 in.),modules add ≤ 2cm (0.8 in.) L & H
Weight2.5 lb., modules add 0.5 lb. each
1.2kg, modules add 0.2kg each
Warranty3 year meter and module warranty