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Thermo Scientific™ Orion Star™ A111 pH Benchtop Meter

Take simple pH, mV and temperature measurements with the Thermo Scientific™ Orion™ Star A111 pH Benchtop Meter with easy operation for basic lab testing

Manufacturer:  Thermo Scientific™ ORISTARA1110

 View more versions of this product

Catalog No. 13-645-501



Take simple, routine pH, mV and temperature measurements with the Thermo Scientific™ Orion™ Star A111 pH Benchtop Meter, an easy-to-use and budget-friendly instrument for basic pH analysis in the lab. Perform up to a three point pH calibration with easy recall of calibration points and slope. Quickly navigate setup menus and ensure consistent calibrations using the simple keypad layout and on-screen text prompts. Use the included electrode stand to easily place sensors in samples and simplify storage to minimize breakage.

Thermo Scientific Orion Star A111 pH Benchtop 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, meter mode, calibration information and power source
  • Don't miss a reading — AUTO-READ™ locks in the stable reading on your screen and ready indicator alerts when readings are stable
  • Up to three point pH calibration
  • Automatic recognition of USA/NIST and DIN buffers
  • Easily recall calibration slope data for procedure checks
  • Nonvolatile memory holds up to 50 data points
  • Included electrode arm and newly designed probe holder make it easier to maintain and place probes into samples
  • Plug the meter into almost any power outlet with the included universal power adapter or use four AA batteries (sold separately) to run the meter on DC power
  • The IP54-rated housing can handle splashes and can be wall-mounted if table space is a problem
Includes: Orion STAR A111 pH Benchtop Meter, Part no. STARA1110, includes electrode arm with redesigned holder and universal power adapter

Orion STAR A111 pH Benchtop Meter Kit, Part no. STARA1115, includes 9157BNUMD Orion Triode™ 3-in-1 pH/ATC probe; Solution kit (60mL each of pH 4, 7 and 10 buffers; storage solution and cleaning solution); electrode arm with redesigned holder and universal power adapter

Orion STAR A111 pH Benchtop Meter Kit, Part no. STARA1116, includes GD9156BNWP Orion Green electrode; 927007MD Stainless Steel ATC Probe; electrode arm with redesigned holder and universal power adapter



41° to 113°F (ambient)
0.1°C, 0.1°F
1 point temperature offset calibration
-5.0° to 105.0° C
2 lb.
4 x AA (sold separately)
1 point relative mV (RmV) mode
Orion Star A111 pH benchtop meter with stand
0.1, 0.01
Star A111 pH meter, electrode stand, universal power adapter, literature CD, printed quick start guide and meter test certificate
BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe)
Simple with highlighted measure key, scroll and shortcut keys
pH, mV or relative mV (RmV) with temperature
Universal AC adapter (included) or 4 AA batteries (sold separately)
5 to 85%, non-condensing
±1600.0 mV
Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Smart Stability and Smart Averaging
22.0° to 221.0° F
5° to 45°C (ambient)
3 year meter warranty
Manual or automatic with ATC temperature probe
Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
±0.2 mV or ±0.05% of reading whichever is greater
2000 hr.
pH, relative mV (RmV) and temperature
Internal data point memory
CE, TUV 3-1, FCC Class A
24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
-2.00 to 16.00
Non-volatile memory preserves log and settings
Orion Star A111 pH/mV/RmV/Temperature Benchtop Meter
pH electrode, ORP electrode, ATC temperature probe (purchase separately)

Limited warranty period: Subject to all warranty requirements and exclusions set out in our Terms and Conditions of Sale, this product is warranted from the date we ship the product and for ninety (90) days thereafter. Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.