Thermo Scientific™ Orion Star™ A121 pH Portable Meter

Take simple pH and temperature measurements with the Thermo Scientific™ Orion™ Star A121 pH Portable Meter with easy operation for basic field testing

Manufacturer: Thermo Scientific™ STARA1215

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Catalog No. 13-645-506

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    Description Orion Star A121 pH portable meter kit with Triode pH/ATC electrode, solutions, meter armor and field case
    Model Orion Star A121 pH/mV/RmV/Temperature Portable Meter
    Item Description Orion Star A121 pH portable meter kit with Triode pH/ATC electrode, solutions, meter armor and field case
    Includes Star A121 pH meter, 9107BNMD Orion Triode gel-filled epoxy-body pH/ATC electrode, 916099 pH buffer and solution kit, protective meter armor, hard-sided field case, 4 AA batteries, literature CD, printed quick start guide and meter test certificate
    Range (pH) -2.00 to 16.00pH
    Resolution (pH) 0.1, 0.01pH
    Accuracy (pH) ±0.01pH
    Range (mV) ±1600.0mV
    Range (Relative mV) ±1999.9mV
    Resolution (mV) 0.1mV
    Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
    Calibration pH, relative mV (RmV) and temperature
    Calibration Points (pH) 1 to 3
    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
    Resolution (Temperature) 0.1°C, 0.1°F
    Accuracy (Temperature) ±0.1°C
    Temperature Selection Manual or automatic with ATC temperature probe
    Temperature Probe Calibration 1 point temperature offset calibration
    Channels 1
    Display Type LCD
    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
    Data Management Details Internal data point memory
    Data Points 50
    Log Function Type Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
    Memory Non-volatile memory preserves log and settings
    Languages English
    Inputs BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe)
    Outputs None
    Probe Type pH electrode, ORP electrode, ATC temperature probe (includes 9107BNMD Orion Triode pH/ATC electrode)
    Power Supply 4 AA batteries (included) or universal AC adapter (sold separately)
    AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
    Battery Life 2000 hours
    Battery Type Four AA (included)
    IP Rating IP-67
    Certifications/Compliance CE, TUV 3-1, FCC Class A
    Temperature (English) Operating 41° to 113°F (ambient)
    Temperature (Metric) Operating 5° to 45° C (ambient)
    Relative Humidity Range 5 to 85 %, non-condensing
    Dimensions (L x W x H) 24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)
    Weight (English) 2 lb.
    Weight (Metric) 0.5kg
    Warranty 3 year meter warranty

    Take simple, routine pH, mV and temperature measurements with the Thermo Scientific™ Orion™ Star A121 pH Portable Meter, an easy-to-use and budget-friendly instrument for basic pH analysis in the field. 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. This waterproof meter has an IP67-rated housing for rugged protection in outdoor environments.


    • Large, informative screen clearly shows the main information, including pH or mV reading, temperature in °C or °F, meter mode, calibration information and battery life.
    • Thermo Scientific™ AUTOREAD™ locks in the stable reading on your screen and indicator alerts user when readings are stable.
    • Meter includes up to three point pH calibration and automatic recognition of USA/NIST™ and DIN buffers.
    • User can easily recall calibration slope data for procedure checks.
    • Nonvolatile memory holds up to 50 data points.
    • Four AA batteries (included) provide more than 2,000 hours of operation or purchase the universal power adapter (sold separately) to run meter on AC power.
    • Meter is perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing.

  • Description & Specifications

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