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™ STARA1210

 View more versions of this product

Catalog No. 13-645-504

  Check Availability
Add to Cart


    Inputs BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe)
    Probe Type pH electrode, ORP electrode, ATC temperature probe (purchase separately)
    Warranty 3 year meter warranty
    Isopotential Point 7.00pH
    Channels 1
    Power Supply 4 AA batteries (included) or universal AC adapter (sold separately)
    Calibration pH, relative mV (RmV) and temperature
    Calibration Points 1 point relative mV (RmV) mode
    Temperature Selection Manual or automatic with ATC temperature probe
    Model Orion Star A121 pH/mV/RmV/Temperature Portable Meter
    Temperature Probe Calibration 1 point temperature offset calibration
    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
    Item Description Orion Star A121 pH portable meter
    Memory Non-volatile memory preserves log and settings
    Languages English
    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
    Range (Relative mV) ±1999.9mV
    Data Points 50
    Log Function Type Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
    Description Orion Star A121 pH portable meter
    Calibration Points (pH) 1 to 3
    Range (Temperature) -5.0° to 105.0° C, 22.0° to 221.0° F
    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 (sold separately, Cat. No. 1010003)
    Battery Life 2000 hours
    Battery Type Four AA (included)
    Range (pH) -2.00 to 16.00pH
    Range (mV) ±1600.0mV
    Resolution (mV) 0.1mV
    Accuracy (Temperature) ±0.1°C
    Display Type LCD
    Includes Star A121 pH meter, 4 AA batteries, literature CD, printed quick start guide and meter test certificate
    IP Rating IP-67
    Certifications/Compliance CE, TUV 3-1, FCC Class A
    Temperature (English) Operating 41° to 113°F (ambient)
    Relative Humidity Range 5 to 85 %, non-condensing
    Resolution (pH) 0.1, 0.01pH
    Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
    Outputs None
    Temperature (Metric) Operating 5° to 45° C (ambient)
    Accuracy (pH) ±0.01pH

    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.

    Thermo Scientific Orion Star A121 pH Portable 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 in °C or °F, meter mode, calibration information and battery life
    • Don't miss a reading — AUTOREAD™ 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
    • Four AA batteries (included) provide over 2000 hours of operation or purchase the universal power adapter (sold separately) to run meter on AC power
    • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing
    • Three year meter replacement warranty

  • Description & Specifications

Related Products

Product Content Feedback

We continue to work to improve your shopping experience and your feedback regarding this content is very important to us. Please use the form below to provide feedback related to the content on this product.

Product Title

By clicking Submit, you acknowledge that you may be contacted by Fisher Scientific in regards to the feedback you have provided in this form. We will not share your information for any other purposes. All contact information provided shall also be maintained in accordance with our Privacy Policy.

Cancel Submit