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™ STARA1116

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Catalog No. 13-645-610

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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.


    Inputs BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe)
    Probe Type pH electrode, ORP electrode, ATC temperature probe (includes GD9156BNWP Double Junction pH electrode, 927007MD Orion ATC probe)
    Warranty 3 year meter warranty
    Calibration pH, relative mV (RmV) and temperature
    Calibration Points 1 point relative mV (RmV) mode
    Isopotential Point 7.00pH
    Range (Temperature) -5.0° to 105.0° C, 22.0° to 221.0° F
    Temperature Selection Manual or automatic with ATC temperature probe
    Model Orion Star A111 pH/mV/RmV/Temperature Benchtop Meter
    Temperature Probe Calibration 1 point temperature offset calibration
    Channels 1
    Keypad Simple with highlighted measure key, scroll and shortcut keys
    Measurement Modes pH, mV or relative mV (RmV) with temperature
    Stability Smart Stability and Smart Averaging
    Memory Non-volatile memory preserves log and settings
    Languages English
    Power Supply Universal AC adapter (included) or 4 AA batteries (sold separately)
    Includes Star A111 pH meter, GD9156BNWP Double Junction pH electrode, 927007MD Orion stainless steel ATC probe, electrode stand, universal power adapter, literature CD, printed quick start guide and meter test certificate
    Dimensions (L x W x H) 24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
    Weight (Metric) 0.9kg
    Weight (English) 2 lb.
    Calibration Points (pH) 1 to 3
    Display Type LCD
    Data Points 50
    Log Function Type Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
    Outputs None
    Temperature (Metric) Operating 5° to 45° C (ambient)
    Range (pH) -2.00 to 16.00pH
    Accuracy (pH) ±0.01pH
    Resolution (Temperature) 0.1°C, 0.1°F
    Data Management Details Internal data point memory
    AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
    Battery Type Four AA (sold separately)
    IP Rating IP-54
    Certifications/Compliance CE, TUV 3-1, FCC Class A
    Temperature (English) Operating 41° to 113°F (ambient)
    Resolution (pH) 0.1, 0.01pH
    Description Orion Star A111 pH benchtop meter kit with Green Double Junction pH electrode, ATC probe and stand
    Resolution (mV) 0.1mV
    Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
    Accuracy (Temperature) ±0.1°C
    Battery Life 2000 hours
    Relative Humidity Range 5 to 85 %, non-condensing
    Range (mV) ±1600.0mV
    Range (Relative mV) ±1999.9mV

    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.


    • Large, informative screen clearly shows the main information, including pH or mV reading, temperature, meter mode, calibration information and power source.
    • Thermo Scientific™ AUTO-READ™ locks in the stable reading on your screen and ready indicator alerts when readings are stable
    • Meter offers up to three point pH calibration and automatic recognition of USA/NIST and DIN buffers.
    • Use can 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.

    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

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