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Thermo Scientific™ Orion Star™ A121 pH Portable Meter

Manufacturer: thermo scientific™  STARA1215EMD

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Catalog No. S04968


Description & Specifications


For Use With (Application) pH, mV, Temperature
Temperature (Metric) Range -5° to +105°C
Type Meter Kit

Thermo Scientific Orion Star A121 pH Portable Meters combine simplicity with accuracy. A large LCD displays pH or mV readings along with temperature. Icons provide quick updates on battery life, electrode status and calibration information. Simple button layout and onscreen messages help with calibration and setup menu choices.

  • Large, informative screen clearly shows the main information, including pH or mV reading, temperature in °C or °F, meter mode, calibration information and battery life
  • Don't miss a reading - Auto-Read measurement mode locks in the stable reading on your screen and ready indicator alerts when readings are stable
  • Up to 3 point pH calibration
  • Automatic recognition of USA/NIST and DIN buffers
  • Easily recall calibration slope data for procedure checks
  • Non-volatile memory holds up to 50 data points
  • Four AA batteries (included) provide over 2000 hours of operation or purchase the universal power adapter (sold separately) to run meter on AC power
  • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing
  • 3 year meter replacement warranty


  • Accuracy (mV): ±0.2 mV or ±0.05% of reading whichever is greater
  • Accuracy (pH): ±0.01pH
  • Battery Life: 2000 hours
  • Inputs: BNC (pH), 8-pin Mini-DIN (temperature)
  • Probe Type: ±pH electrode, ATC probe, ORP electrode - purchase separately
  • Range (mV): 1600.0mV
  • Range (pH): -2.00 to 16.00pH
  • Relative Humidity Range: 5 to 85 %, non-condensing
  • Resolution (mV): 0.1mV
  • Resolution (pH): 0.1, 0.01pH
  • Temperature (Metric) Operating: 5 to 45°C
  • Temperature Range: -5° to +105°C
  • Calibration Points (pH): 1 to 3