Thermo Scientific pH Benchtop Meter

pH Benchtop Meter

  • Measure pH, mV, relative mV or ORP with temperature
  • Perform up to a five point pH calibration 
  • Easy to use and reliable
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Model : STARA2110

  • No electrode or pH buffer and solution kit included


Model : STARA2114

  • 8172BNWP ROSS Sure-Flow glass-body pH electrode
  • 927007MD stainless steel ATC probe
  • 810199 ROSS pH buffer and solution kit


Model : STARA2115

  • 302BNUMD ROSS Ultra Triode glass-body pH/ATC electrode
  • 810199 ROSS pH buffer and solution kit


Model : STARA2116

  • 8157BNUMD ROSS Ultra Triode epoxy-body pH/ATC electrode
  • 810199 ROSS pH buffer and solution kit


Model : STARA2117

  • 9157BNMD Triode epoxy-body pH/ATC electrode
  • 910199 pH buffer and solution kit


Model : STARA2118

  • 8102BNUWP ROSS Ultra glass-body pH electrode
  • 927007MD stainless steel ATC probe
  • 810199 ROSS pH buffer and solution kit


Model : STARA2119

  • 9165BNWP Sure-Flow epoxy-body pH electrode
  • 927007MD stainless steel ATC probe
  • 910199 pH buffer and solution kit

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.

Thermo Scientific Orion Star A211 pH benchtop meters are easy to use, dependable laboratory meters with advanced features and functions. Selectable read modes and stability indicators give you flexibility and control over your testing. All critical data is shown with your measurements including temperature, date and time, read type, measurement stability, active calibration information, and electrode condition icon. Onscreen calibration and setup instructions can be displayed in several local languages with new languages added through software updates. 

Navigation is fast and simple due to the comprehensive keypad with menu-specific function keys, dual-purpose scroll/shortcut keys, plus power, measure, log view, and stirrer keys that ensure easy operation. All setup menus are in one location with direct access using a single shortcut key so you can quickly access, evaluate and change measurement and instrument settings.

  • Measure pH, mV, relative mV, or ORP with temperature
  • Perform up to a five-point pH calibration using automatic buffer recognition of NIST or DIN buffer groups with the choice to manually enter custom buffer values
  • The calibration editing option allows individual points to be fixed without a full recalibration
  • Informative, easy-to-read backlit graphic display with clear onscreen instructions simplifies operation
  • Capture your critical readings with measurement stability indicator and selectable read modes – Auto-Read holds a stable reading, Continuous shows changing readings with hold option, and Timed logs data at specific intervals
  • Eliminate the need for magnetic stir bars using the meter-controlled stirrer probe (catalog number 096019) to uniformly mix solutions
  • Data log collects and date/time stamps up to 2000 measurement sets with optional sample ID and user ID
  • Calibration log stores the ten most recent calibrations
  • Non-volatile meter memory ensures your data and settings are protected, even with the loss of power
  • Orion Star Com software facilitates data transfer to a computer via USB or RS232 connections
  • Flexible power options with universal power adapter or optional AA batteries
  • IP54-rated housing resists dust and splashes and can be wall-mounted if table space is limited
  • Meters include CE, TUV 3-in-1, and FCC Class A certifications and a 3-year replacement warranty

All kits include:

An electrode stand, universal power adapter, literature CD, printed quick start guide, computer interface cable, and meter test certificate.

Operating Temperature41° to 113°F (ambient)
5° to 45°C (ambient)
Temperature Range22.0° to 221.0° F
-5.0° to 105.0° C
StabilitySelectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Temperature Resolution0.1°C, 0.1°F
Temperature Probe Calibration1 point temperature offset calibration
Weight 2 lb.
Temperature SelectionManual or automatic with ATC temperature probe
AC AdapterUniversal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
Accuracy (pH)±0.002pH
Accuracy (mV)±0.2 mV or ±0.05% of reading whichever is greater
Backlight OptionYes, selectable
Alarm OutputHigh/low limit alarm, calibration due alarm
Accuracy (Temperature)±0.1°C
Battery Life800 hr.
Battery Type4 x AA (sold separately)
CalibrationpH with calibration editing option, relative mV (RmV),ORP and temperature
Calibration Points1 to 5
Data Management DetailsTransfer single, range or all data points to printer or computer
Certifications/ComplianceCE, TUV 3-1, FCC Class A
DescriptionOrion Star A211 pH benchtop meter with stand
LanguagesEnglish, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Log Function TypeAutomatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous measure mode
Dimensions (L x W x H)24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
Data Points2000 with date and time stamp
Display TypeLCD (Graphic with backlight)
Resolution (pH)0.1, 0.01, 0.001
Range (pH)-2.000 to +20.000
IncludesStar A211 pH meter, electrode stand, universal power adapter, literature CD, printed quick start guide, computer interface cable and meter test certificate
IP RatingIP-54
InputsBNC (pH or ORP electrode),pin-tip (reference electrode),8 pin MiniDIN (ATC temperature probe),stirrer input (stirrer probe)
Isopotential Point7.000pH
KeypadComprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
MemoryNon-volatile memory preserves data log, calibration log and meter settings
Methods10 per channel with password protection
Measurement ModespH, mV, relative mV (RmV) or ORP with temperature
ModelOrion Star A211 pH/mV/RmV/ORP/Temperature Benchtop Meter
OutputsUSB, RS-232
Probe TypepH electrode, ORP electrode, reference half-cell electrode, ATC temperature probe, stirrer probe (purchase separately)
Power SupplyUniversal AC adapter (included) or 4 AA batteries (sold separately)
Range (ORP)±2000.0mV
Range (Relative mV)±2000.0mV
Relative Humidity Range5 to 85%, non-condensing
Resolution (mV)0.1mV
Range (mV)±2000.0mV