Orion Star® A220 Series Portable pH Meter (Thermo Scientific)

pH Portable Meter Kit includes:

  • Ross Triode gel-filled epoxy-body waterproof electrode Weber# 3808-76
  • pH 4.01 Buffer (475 mL)
  • pH 7.00 Buffer (475 mL)
  • pH 10.01 Buffer (475 mL)
  • pH electrode storage solution
  • pH electrode cleaning solution
  • pH electrode rinse solution
  • Hard carrying case


  • 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
  • The large, backlit graphic LCD display shows pH/mV/RmV and temperature along with electrode status, time, date and calibration points
  • Plain language screen prompts, soft keys that update for easy selection and a multilanguage interface
  • Fix calibration errors without a complete recalibration with calibration editing
  • Non-volatile memory holds up to 1000 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
  • Mix samples without a stir plate with direct control of the Orion Star stirrer probe (096019, sold separately)
  • Included electrode arm and newly-designed probe holder make it easier to maintain and place probes into samples
  • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing


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 to 105
Temperature Resolution 0.1
Temperature Relative Accuracy ±0.1
Inputs BNC, reference pin, 8-pin mini-DIN
Output RS-232, USB
Power Requirements Four AA batteries included (AC adaptor sold separately)
Item number 1068-22 800 hours
Certifications CE, TUV, FCC Class A limits
Warranty 3 year meter replacement
Description/Item No. Details Mfr. Item No. Your Cost/Qty Purchase
Star® A220 Series Portable pH Meter
pH Portable Meter only StarA2210
List Price $625.00/EA
Buy 1 $533.21/EA
Buy 2 $489.29/EA
Sign in to Buy 1 In Stock 1 In Stock
Star® A220 Series Portable pH Meter Kit
List Price $1,227.00/EA
Buy 1 $1,046.47/EA
Buy 2 $960.29/EA
Sign in to Buy This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you’d like us to keep stock in the future In Stock