A111 pH Benchtop Meter

  • Accurate pH Measurements pH meter for taking simple accurate readings
  • IP54 Rated Hosing Suitable for use in the Field
  • Non Volatile Memory Holds up to 50 data points
Product Options


RS Hydro now stock the Thermo Scientific™ Orion Star™ A111 pH Benchtop Meter ideal for taking simple pH readings. The meter features a large screen displaying pH or mV reading, temperature, meter mode, calibration information and power source. Included with this meter is a electrode arm and newly designed probe holder to make maintenance simple and placement of probes into samples a simple procedure. There are many features which make this benchtop meter the perfect choice:

  • Up to three point pH calibration
  • - Automatic recognition of USA/NIST and DIN buffers
  • - Easy recall calibration slope data for procedure checks
  • AUTO-READ™ locks in stable readings and ready indicator alerts when readings are stable
  • An IP54-rated housing which can handle splashes
  • Can be wall mounted if table space is a problem
  • Powered either by plugging into any power outlet using the included universal power adapter or use four AA batteries

Manufactured by: Thermo Scientific
Model: A111 pH Benchtop Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (pH) ±0.01pH
Battery Life 2000 hours
Battery Type Four AA (sold separately)
Data Management Details 50 point non-volatile memory; option to delete last point or delete all
Data Points 50
Description Orion Star A111 pH/mV/Temperature Benchtop Meter
Inputs BNC (pH), 8-pin Mini-DIN (temperature)
IP Rating IP-54
Outputs None
Configuration Details Star A111 pH Meter with Electrode Stand; Universal Power Adapter
Probe Type pH electrode, ATC probe, ORP electrode
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 (English) Operating 41° to 113°F
Temperature (Metric) Operating 5 to 45°C
Accuracy (Temperature) ±0.1°C
Temperature Range (English) 23° to 221°F
Temperature Range (Metric) –5° to +105°C
Resolution (Temperature) 0.1°C
Range (Relative mV) ±1999.9 RmV
Calibration Points (pH) 1 to 3
AC Adapter Universal 90-260 VAC (included)
Display Type LCD
Log Function Type Manual, automatic with AUTO-READ
Packaging Meter and stand only
Certifications/Compliance CE, TÃ????????????????????V, FCC Class A limits