Orion Star™ A211 Series Benchtop pH Meter (Thermo Scientific)

StarA2115 pH Benchtop Meter Kit includes:

  • Ross Ultra Triode Refillable Electrode
  • pH 4.01 Buffer (475 mL)
  • pH 7.00 Buffer (475 mL)
  • pH 10.01 Buffer (475 mL)
  • pH electrode storage


  • Up to 5 point pH calibration with automatic recognition for USA/NIST and DIN buffers
  • AUTO-READ® locks in the stable reading on your screen, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals
  • Plain language screen prompts, soft keys that update for easy selection and a multi-language interface
  • Fix calibration errors without a complete recalibration with calibration editing
  • Non-volatile memory holds up to 2000 data points with time and date stamp
  • Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software
  • Included newly-designed probe holder that makes it easier to maintain and place probes into samples
  • Included universal AC power adapter, or use four AA batteries (sold separately)
  • IP54-rated housing handles splashes and is wall-mountable if table space is a problem


pH Range -2.000 to 20.000
pH Resolution 0.1, 0.01, 0.001
pH Relative Accuracy ±0.002
mV Range ±2000.0
mV Resolution 0.1
mV Relative Accuracy ±0.2 mV or ±0.05% of reading whichever is greater
Temperature Range -5°C to +105°C
Temperature Resolution 0.1
Temperature Relative Accuracy ±0.1
Inputs BNC, reference pin, 8-pin mini-DIN, stirrer port
Battery Life 2000 hours
Certifications CE, TUV 3-1, FCC Class A
Warranty 3 year meter replacement

Description/Item No. Details Mfr. Item No. Your Cost/Qty Purchase
Star® A211 Series Benchtop pH Meter
pH Benchtop Meter only StarA2110
Buy 1 $826.59/EA
Buy 2 $758.51/EA
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Star® A211 Series Benchtop pH Meter Kit
ROSS Ultra Triode refillable electrode, ROSS pH buffers, electrode storage, cleaning solution and swing arm StarA2115
Buy 1 $1,132.10/EA
Buy 2 $1,038.86/EA
Sign in to Buy 1 In Stock 1 In Stock
Star™ A211 Series Benchtop pH Meter Kit
includes: ROSS Ultra Triode epoxy-body pH/ATC electrode, ROSS pH buffer and solution kit StarA2116
Buy 1 $1,156.30/EA
Buy 2 $1,061.07/EA
Sign in to Buy 1 In Stock 1 In Stock