Thermo Orion VSTAR91 Versa Star™ Benchtop pH/ORP Redox Meter

  • Model #: VSTAR91
  • Your Price: $3,563.20
    List Price: $4,099.00
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Looking for the top-of-the-line, best meter you can find? Looking for something for everything and meeting all those testing needs? Whether it's one sample that needs a variety of testing or a variety of samples needing one test, the Orion VERSA STAR 90 and 91 advanced multiparameter meters are ready for the job. These meters come fully-loaded and ready to take on multiple measurements.

  • Customize the display to show only the information you need
  • Anyone can use this meter with its plain language screen prompts, function keys that update for easy selection and a multilanguage interface that supports English, Spanish, French, Italian, German and Chinese
  • Non-volatile memory holds up to 2000 data points with time and date stamp
  • Stores up to 10 methods per channel allow for customized procedures to differentiate between tests and/or users
  • Two USB and a RS232 port makes for easy data transfer and updating meter software
  • Includes data analysis software for easy transferring of stored results or real-time viewing
  • Control sample mixing directly from the meter without a separate stir plate when using with the Orion Star stirrer probe (cat. no. 096019, sold separately)
  • Increase your productivity - with two Orion stirrer probe ports, add stirrers and modules to analyze two separate samples at the same time
  • Included electrode arm and newly-designed probe holder make it easier to maintain and place probes into samples
  • Works with almost every AC power source through the included universal power adapter
  • IP54-rated housing handles splashes and cleans up easily
  • 3 year meter replacement warranty
Technical Specifications:
pH-range-2.000 to 20.000
pH-resolutionSelectable 0.1, 0.01, 0.001
pH-relative accuracy±0.002
Calibration PointsUp to 6
Calibration EditingYes
Adjustable ISO PointYes
mV/Rel mV/ORP Range±2000.0 mV
mV/Rel mV/ORP Resolution0.1
mV Relative Accuracy±0.2 mV or ±0.05% or reading, whichever is greater
EH ORP ModeYes
ISE Range0 to 19999
ISE ResolutionUp to 4 significant digits
ISE Relative Accuracy±0.2 mV or ±0.05% or reading, whichever is greater
ISE Unitsppm, M, mg/L, %, ppb, none
ISE Calibration PointsUp to 6
ISE Calibration EditingYes
ISE Adjustable ISO PointYes
ISE Calibration FeaturesTimed end point, linear point to point, non-linear selectable auto-blank, low concentration range stability
ISE Incremental TechniquesSingle known addition & subtraction
Double known addition & subtraction
Single analate addition & subtraction
ISE Advanced FeaturesDisplays electrode type, temperature compensation
Temperature Range-5 to 105 °C, 23 to 221 °F
Temperature Resolution0.1
Temperature Relative Accuracy±0.1
Temperature Offset Calibration1 point
Inputs pH/ISE ModuleBNC, reference pin
Input pH/ISE Temperature8-pin mini-DIN
Conductivity Range0.001 µS to 3000 mS
Conductivity Resolution0.001 µS minimum; 4 significant fugures minimum
Conductivity Relative Accuracy0.5% reading ±1 digit
Conductivity Reference Temp.5, 10, 15, 20, 25 ° C
Conductivity Temp. CompensationLinear (0 to 10.0%/°C), nLn, nLFu, USP/EP
Conductivity Compatible Cell Constants0.001 to 199.9
Conductivity Calibration PointsUp to 6 points
Conductivity Calibration EditingYes
Resistivity Range2 ohm to 100 meg-ohm
Resistivity Resolution2 ohms-cm
Resistivity Relative Accuracy0.5% reading ±1 digit
Salinity TypePractical salinity or natural sea water
Salinity Range0.01 to 80.0 ppt NaCl equivalent; 0.01 to 42 ppt sea water
Salinity Resolution0.01
Salinity Relative Accuracy±0.1
TDS Range0 to 200 ppt
TDS Resolution4 significant digits
TDS Relative Accuracy±0.5% reading ±1 digit
TDS Factor RangeLinear 0.01 to 10.00
Temperature Range-5 to 105 °C, 23 to 221 °F
Temperature Resolution0.1
Temperature Relative Accuracy±0.1
Temperature Offset Calibration1 point
Input Conductivity Module8-pin min-DIN
DO Concentration Polargraphic Range0 to 90 mg/L
DO Concentration Polargraphic Resolution0.01, 0.1
DO Concentration Polargraphic Relative Accuracy±0.2
DO % Saturation Polargraphic Range0 to 600
DO % Saturation Polargraphic Resolution0.1, 1
DO % Saturation Polargraphic Relative Accuracy±2%
DO Concentration RDO Range0 to 50 mg/L
DO Concentration RDO Resolution0.01, 0.1
DO Concentration RDO Relative Accuracy±0.1 mg/L up to 8mg/L
±0.2 mg/L from 8 to 20 mg/l
10% of reading, 20 to 50 mg/L
DO % Saturation RDO Range0 to 500
DO % Saturation RDO Resolution0.1, 1
DO % Saturation RDO Relative Accuracy±2%
Automatic Barometric Pressure Correction450.0 to 850.0 mm Hg
Salinity Factor CorrectionAutomatic when used with conductivity module and probe or manual; 0 to 45 ppt
Calibration featuresWater saturated air, or saturated water, manual (Winkler) and zero point
Probe TypePolargraphic or RDO
Temperature Range0 to 50 °C, 32 to 122 °F
Temperature Resolution0.1
Temperature Relative Accuracy±0.1
Temperature Offset Calibration1 point
Input RDO/DO Module9-pin mini-DIN
Electrodes SuppliedNone
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