Thermo Scientific Orion 3-Star Plus


Orion 3-Star Plus

This competitively-priced, single-channel pH meter is easy to set up and use while providing reliable, accurate pH measurement for any general laboratory or QC application. The rugged meter offers a full complement of GLP-related features. You can record and store up to 10 setup parameters and calibrations—a valuable feature for busy multi-user labs.
Orion 3-Star Plus
mV Accuracy ± 0.2
mV Resolution 0.1 mV
pH Accuracy ± 0.002
pH Meter Temperature Range -5 to 105 °C
pH Meter Type Benchtop
pH Range -2 to 19.999
pH Resolution Selectable
Temperature Accuracy .1 °C
Additional Specifications SMART STABILITY™ and SMART AVERAGING™ : Resolution dependent / automatic
AUTO-CAL™ and/or Manual Calibration : 1 to 5 points; US/NIST, DIN, and custom buffers recognized
mV :
ORP : EH autocalibration to standard hydrogen electrode
Resolution : 0.1 up to 99.9 °C, 1.0 over 99.9 °C
Temperature Compensation : Auto/Manual
Display : Custom backlit LCD, for easy viewing
Sensor Inputs : pH - BNC; ATC-miniDIN-Locking; Reference-Pin tip; Stirrer-Phono-jack
Communications : Bi-directional RS232 - Stereo jack, optional USB interface Cable


  • Bright LCD display with ready indication
  • Convenient built-in Quick-Start Guide
  • Automatic or manual calibration
  • Stores up to 10 methods with password protection
  • IP54 dustproof and splashproof
  • BNC pH electrode connectors
  • Automatic or manual pH calibration with 1 to 5 calibration points
  • Auto-Buffer Recognition (ABR) of DIN and NIST/US buffers
  • Advanced self-tests on meter operation, self-diagnostics
  • CE, CSA, UL, TÜV and FCC Class A limits approved
  • Universal power adapter for worldwide operation
  • Three-year replacement warranty.


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Computer program

I just purchased a used D.O. meter and I was wondering if this instrument has the ability to interface with a computer? Are there any BOD calculating programs that are compatible with this instrument?

interfacing to computer

I am working on interfacing a thermo Orion 3 star pH meter with a PC through HyperTerminal. I am very new to using HyperTerminal and I am struggling to log all the data. I basically want a pH reading every minute to be measured and send over to...

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