| 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 Functions |
Timed endpoint, linear point to point, 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 Point |
7.000pH (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 Range |
Linear (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 Modes |
Practical 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 Constant |
0.001 to 199.9cm-1 |
| Temperature Compensation |
Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off |
| Temperature (Metric) Reference |
5°, 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) |
±0.2 mg/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) |
±0.1 mg/L up to 8 mg/L, ą0.2 mg/L from 8 to 20 mg/L, ±10% of reading up to 50 mg/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 ą2% 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 Correction |
400 to 850mmHg, automatic using built-in barometer or manual entry |
| Pressure Range |
400 to 850mmHg |
| Pressure Resolution |
0.1mmHg |
| Accuracy (Barometer) |
±6 mmHg |
| Salinity Factor |
0.0 to 45.0 ppt, automatic correction using conductivity reading or manual entry of sample salinity |
| Calibration |
pH 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 Points |
1 point relative mV (RmV) mode, 1 point ORP mode |
| Calibration Points (Conductivity) |
Up to 6 |
| Calibration Modes |
Water-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 Selection |
Manual or automatic with ATC temperature probe |
| Temperature Probe Calibration |
1 point temperature offset calibration |
| Channels |
4 - customizable with modules |
| Display Type |
Color graphic LCD with user-customizable options |
| Backlight Option |
Yes |
| Keypad |
Numeric with menu-specific function keys and dual purpose scroll/shortcut keys |
| Measurement Modes |
pH, 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 |
| Stability |
Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting |
| Data Management Details |
Transfer single, range or all data points to printer or computer |
| Data Points |
2000 with date and time stamp |
| Log Function Type |
Automatic data logging with Auto-Read, Timed and Single Shot measure modes; manual data logging with Continuous measure mode |
| Memory |
Non-volatile memory preserves data log, calibration log and meter settings |
| Alarm Output |
Set point alarm, high/low limit alarm, calibration due alarm |
| Methods |
10 per channel with password protection |
| Languages |
English, Spanish, French, Italian, German, Chinese, Portuguese and Korean |
| Inputs |
BNC (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 |
| Outputs |
USB (2), RS232 |
| Power Supply |
Universal AC adapter (included) |
| AC Adapter |
Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR) |
| IP Rating |
IP-54 |
| Certifications/Compliance |
CE, TUV 3-1, FCC Class A |
| Temperature (English) Operating |
41° to 113°F (ambient) |
| Temperature (Metric) Operating |
5 to 45°C (ambient) |
| Relative Humidity Range |
5 to 85%, non-condensing |
| Dimensions (L x W x H) |
28 x 24 x 10cm (11 x 9.5 x 3.9 in.), modules add ≤ 2cm (0.8 in.) L & H |
| Weight (Metric) |
1.2kg, modules add 0.2kg each |
| Weight (English) |
2.5 lb., modules add 0.5 lb. each |
| Model |
Orion Versa Star Pro 90 pH/ISE/mV/RmV/ORP/Conductivity/TDS/Salinity/Resistivity/RDO Optical/Dissolved Oxygen/Temperature Benchtop Meter |
| Warranty |
3 year meter and module warranty |
| Power Rating |
DC input: 9VDC, 1A |