Thermo Scientific - Orion 4-Star Plus Portable
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Orion 4-Star Plus pH/Conductivity Portable Multiparameter Meter
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Features of Orion 4-Star Plus Portable
Easy to operate in any mode
- Bright, backlit LCD display with ready indication
- Balanced comfortable handling
- Simultaneous display of pH or mV and conductivity, plus temperature
- Convenient built-in Quick-Start Guide with calibration instructions
- Stores, displays and prints up to 10 methods with individual method password protection
- Automatic or manual temperature compensation
- Auto-read/hold function
- IP67 waterproof
Extra features in every mode
- pH: automatic or manual calibration; 1 to 5 calibration points; auto-buffer-recognition of NIST/US and DIN buffers
- mV/ORP: EH autocalibration to standard hydrogen electrode
- Conductivity/Resistivity/Salinity/TDS: 1 to 5 calibration points; three decimal point cell constant entry; compatible with 2-cell, 4cell, planar cell probes; 5°C, linear and nonlinear temperature compensation
Increased accuracy
- Improved stability algorithm improves calibration and measurement accuracy
- SMART STABILITY* and SMART AVERAGING* functions optimize accuracy, precision and response time
- ATC calibration
- Advanced self-tests on meter operation, self-diagnostics
Complete documentation
- Full complement of GLP-related features
- Optional Star Plus Navigator 21 software provides 21 CFR Part 11, GLP IQ/OQ documentation
- 750 point datalogger, downloadable to printer or computer via RS-232 connection
- Average slope and slope of segment printed with measurement
General Specifications
| mV Range | -1999.9 to 1999.9 |
| mV Resolution | 0.1 mV |
| pH Range | -2 to 19.999 |
| pH Resolution | Selectable |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | 0.1 °C |
| mV Accuracy | ±0.2 |
| pH Accuracy | ± 0.002 |
| pH Meter Temperature Range | -5 to 105 °C |
| pH Meter Type | Portable |
Additional Specifications
Conductivity Mode
Range: 0.000 to 3000mS/cm, auto resolution with cell constant dependence
Resolution: 4 signi?cant digits down to 0.001µS/cm, cell constant dependent
Relative Accuracy 0.5% ±1 digit or 0.01µS/cm, whichever is greater
Cell Constants: 0.001 to 199.9cm-1
Cell Compatability: 2 Cell, 4 Cell, or Planar
Calibration: DirectCal*/AUTO-CAL*: 1 to 5 points/1 to 3 points
Reference Temperatures: 5°C, 10°C,15°C, 20°C or 25°C (default); autoranging
Resistivity Mode
Range: 0.0001 to 100Megohm
Resolution: Autoranging
Relative Accuracy: ±0.5% ±1 digit
Salinity Mode
Range: 0.1 to 80.0ppt NaCl equivalent; 0.1 to 42ppt practical salinity
Resolution: 0.1ppt
Relative Accuracy: ±0.5% ±1 digit
TDS Mode
Range: 0 to 19,999mg/L
Resolution: 1mg/L
Relative Accuracy: ±0.5% ±1 digit
Adjustable TDS Factor: 0.0 to 10.0%