Orion VERSA Star Pro VSTAR93 Multi Portable Meter

pH Mode

 Range

-2,000 to 20,000 

 Resolution

0.1, 0.01, 0.001 

 Relative Accuracy

±0.002 

 Calibration Points

up to 6 

 ISE Mode

 Range

0 to 19999 in ppm, M, mg/L, %,

ppb or unitless 

 Resolution

0.0001, up to 4 significant digits 

 Relative Accuracy

±0.2 mV or ±0.05% of reading 

 Calibration Points

up to 6 

 mV Mode

 Range

±2000.0 

 Resolution

0.1 

 Relative Accuracy

±0.2 mV or ±0.05% of reading whichever is greater 

 ORP Mode

Yes 

 Temperature Mode

 Range

-5 to 105 

 Resolution

0.1 

 Relative Accuracy

±0.1 

 DO Mode

 Concentration Range

Polarographic: 0 to 90mg/L, 0 to 600%;

RDO optical: 0 to 50mg/L, 0 to 500% 

 Concentration Resolution

0.01, 0.1mg/L, 0.1, 1% 

 Relative Accuracy

Polarographic: ±0.2mg/L; ±2% 

ROD optical: ±0.1 mg/L up to 8mg/L,

±0.2mg/L up to 20mg/L, 10% or reading

beyond; ±2%

 Calibration

Water-saturated air, air-saturated water,

manual (Winkler) and zero point 

 Conductivity Mode

 Range

0.00 to 3000 mS 

 Resolution

0.001 ㎲ minimum, auto ranging, up to 4 significant digits 

 Relative Accuracy

0.5% reading ± digit 

 Reference Temperature

5˚, 10˚, 15˚, 20˚, 25℃ 

 Compatible Cell Constants

0.001 to 199.9 

 Calibration Points

up to 6 

 Resistivity

 Range

2 Ohm to 100Meg-Ohm 

 Resolution

1 Ohm or 0.1 Meg-Ohm 

 Relative Accuracy

0.5% ±1 digit 

 Salinity

 Type

Practical salinity (psu) or natural

sea water (ppt)

 Range

0.06 to 80.00 psu, 0.05 to 42.00 ppt 

 Resolution

0.01 

 Relative Accuracy

0.5% of reading ±1 digit 

 TDS

 Range

0 to 200 ppt

 Resolution

0.001 ppm, 4 significant digits

 Relative Accuracy

±0.5% reading ±1 digit 

 TDS Factor Range

Linear (0.02 to 9.99) 

 Inputs/Outputs

 Inputs

BNC, reference pin, two 8-pin mini-DIN,

9-pin mini-DIN, Two stirrer ports 

 Data Management

2000 points with date/time stamp 

 Output

RS-232, USB 

 Display

Color, graphic LCD; user-customizable display