Thermo Scientific™ Orion Star™ A211 pH Benchtop Meter

Reliably measure pH, mV, ORP and temperature with the Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter for advanced lab analysis and printer or computer interfacing

Manufacturer: Thermo Scientific™ STARA2115

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Catalog No. 13-645-521

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    Warranty 3 year meter warranty
    Calibration pH with calibration editing option, relative mV (RmV), ORP and temperature
    Calibration Points 1 point relative mV (RmV) mode, 1 point ORP mode
    Isopotential Point 7.000pH
    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 A211 pH/mV/RmV/ORP/Temperature Benchtop Meter
    Temperature Probe Calibration 1 point temperature offset calibration
    Channels 1
    Backlight Option Yes, selectable
    Keypad Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
    Measurement Modes pH, mV, relative mV (RmV) or ORP with temperature
    Stability Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
    Memory Non-volatile memory preserves data log, calibration log and meter settings
    Alarm Output High/low limit alarm, calibration due alarm
    Methods 10 per channel with password protection
    Languages English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
    Power Supply Universal AC adapter (included) or 4 AA batteries (sold separately)
    Includes Star A211 pH meter, 8302BNUMD ROSS Ultra Triode glass-body pH/ATC electrode, 810199 ROSS pH buffer and solution kit, electrode stand, universal power adapter, literature CD, printed quick start guide, computer interface cable 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.
    Range (ORP) ±2000.0mV
    Calibration Points (pH) 1 to 5
    Display Type Graphic LCD with backlight
    Log Function Type Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous measure mode
    IP Rating IP-54
    Certifications/Compliance CE, TUV 3-1, FCC Class A
    Range (pH) -2.000 to 20.000pH
    Resolution (pH) 0.1, 0.01, 0.001pH
    Accuracy (pH) ±0.002pH
    Description Orion Star A211 pH benchtop meter kit with ROSS Ultra Triode glass-body pH/ATC electrode, solutions and stand
    Resolution (mV) 0.1mV
    Resolution (Temperature) 0.1°C, 0.1°F
    Accuracy (Temperature) ±0.1°C
    Data Management Details Transfer single, range or all data points to printer or computer
    Outputs USB, RS232
    Probe Type pH electrode, ORP electrode, reference half-cell electrode, ATC temperature probe, stirrer probe (includes 8302BNUMD ROSS Ultra Triode pH/ATC electrode)
    Temperature (English) Operating 41° to 113°F (ambient)
    Temperature (Metric) Operating 5° to 45° C (ambient)
    Range (mV) ±2000.0mV
    Range (Relative mV) ±2000.0mV
    Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
    Data Points 2000 with date and time stamp
    Inputs BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), stirrer input (stirrer probe)
    AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
    Battery Life 800 hours
    Battery Type Four AA (sold separately)
    Relative Humidity Range 5 to 85 %, non-condensing

    Record accurate and reliable pH, mV, ORP and temperature measurements with the Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter, ideal for a wide range of applications and advanced pH analysis in the lab. Perform up to a five point pH calibration, log up to 2000 data point sets with time / date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer with free downloadable Orion™ Star Com software. Use the included electrode stand to easily place sensors in samples and simplify storage to minimize breakage.

    Large LCD Display:

    • Plain language screen prompts, soft keys that update for easy selection
    • Multilanguage interface that supports English, Spanish, French, Italian, German and Chinese
    • AUTO-READ™ that locks in the stable reading on your screen, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals


    • Up to five point pH calibration with automatic recognition for USA/NIST™ and DIN buffers
    • Calibration editing for fixing calibration errors without a complete recalibration
    • Non-volatile memory to hold up to 2000 data points with time and date stamp
    • USB and RS232 ports and complimentary data analysis software to easily transfer data and keep meter software up-to-date
    • Direct control of the Orion Star stirrer probe (096019, sold separately) for mixing samples without a stir plate


    • Electrode arm and newly designed probe holder make it easier to maintain and place probes into samples
    • Universal power adapter works with almost every AC power source, or use four AA batteries (sold separately) to run the meter on DC power
    • IP54-rated housing handles splashes
    • Wall-mountable if table space is a problem

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