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Thermo Scientific™ Orion Star™ A216 pH/Dissolved Oxygen Benchtop Multiparameter Meter

Reliably measure pH, dissolved oxygen and temperature with the Thermo Scientific™ Orion™ Star A216 pH / DO / RDO Benchtop Meter for advanced lab analysis and interfacing

$2,633.80 - $4,604.78


AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
Accuracy (Barometer) ±6mmHg
Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (pH) ±0.002pH
Accuracy (Polarographic DO) ±0.2mg/L or ±2% of reading, whichever is greater
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Catalog Number Mfr. No. Description Includes Price Quantity    


thermo scientific™
Orion Star A216 pH/RDO/DO benchtop meter with stand Star A216 pH/RDO/DO meter, electrode stand, universal power adapter, literature CD, printed quick start guide, computer interface cable and meter test certificate Each for $2,633.80


thermo scientific™
Orion Star A216 pH/RDO/DO benchtop meter kit with ROSS Ultra Triode epoxy-body pH/ATC electrode, polarographic DO sensor, solutions and stand Each for $4,604.78
Description & Specifications


AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003)
Accuracy (Barometer) ±6mmHg
Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (pH) ±0.002pH
Accuracy (Polarographic DO) ±0.2mg/L or ±2% of reading, whichever is greater
Accuracy (RDO) ±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, ±10% of reading up to 50mg/L
Accuracy (Temperature) ±0.1°C
Alarm Output High/low limit alarm, calibration due alarm
Backlight Option Yes, selectable
Barometric Pressure Correction 400 to 850mmHg, automatic using built-in barometer or manual entry
Battery Life 800 hours
Battery Type Four AA (sold separately)
Calibration pH with calibration editing option, relative mV (RmV), ORP, dissolved oxygen and temperature
Calibration Modes Water-saturated air, air-saturated water, manual (Winkler titration), zero point
Calibration Points 1 point relative mV (RmV) mode, 1 point ORP mode
Certifications/Compliance CE, TUV 3-1, FCC Class A
Channels 2
Data Management Details Transfer single, range or all data points to printer or computer
Calibration Points (pH) 1 to 5
Data Points 2000 with date and time stamp
Dimensions (L x W x H) 24cm x 18cm x 11cm (9.5 in. x 7.1 in. x 4.3 in.)
IP Rating IP-54
Languages English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Range (pH) -2.000 to 20.000pH
Range (Polarographic DO) 0.00 to 90.00mg/L
Range (RDO) 0.00 to 50.00mg/L
Resolution (pH) 0.1, 0.01, 0.001pH
Resolution (Polarographic DO) 0.01, 0.1mg/L
Resolution (RDO) 0.01, 0.1mg/L
Display Type Graphic LCD with backlight
Inputs BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), 9 pin MiniDIN (RDO optical or polarographic DO sensor with built-in temperature), stirrer input (stirrer probe)
Isopotential Point 7.000pH
Keypad Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Log Function Type Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous measure mode
Measurement Modes pH, mV, relative mV (RmV) or ORP with temperature; dissolved oxygen as % saturation or mg/L with temperature and barometric pressure
Memory Non-volatile memory preserves data log, calibration log and meter settings
Methods 10 per channel with password protection
Model Orion Star A216 pH/mV/RmV/ORP/RDO Optical/Dissolved Oxygen/Temperature Benchtop Meter
Outputs USB, RS232
Percent Saturation Range (Polarographic DO) 0.0 to 600.0 % saturation
Percent Saturation Range (RDO) 0.0 to 500.0 % saturation
Percent Saturation Relative Accuracy (RDO) ±2 % saturation ≤ 200 % saturation, ±10 % saturation > 200 % saturation
Percent Saturation Resolution (Polarographic DO) 0.1, 1 % saturation
Percent Saturation Resolution (RDO) 0.1, 1 % saturation
Power Supply Universal AC adapter (included) or 4 AA batteries (sold separately)
Pressure Range 400 to 850mmHg
Pressure Resolution 1mmHg
Range (Temperature) -5.0° to 105.0° C, 22.0° to 221.0° F
Relative Humidity Range 5 to 85 %, non-condensing
Resolution (mV) 0.1mV
Resolution (Temperature) 0.1°C, 0.1°F
Salinity Factor 0.0 to 45.0 ppt, automatic correction using manual entry of sample salinity
Stability Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Temperature (English) Operating 41° to 113°F (ambient)
Temperature (Metric) Operating 5° to 45° C (ambient)
Temperature Probe Calibration 1 point temperature offset calibration
Temperature Selection Manual or automatic with ATC temperature probe
Warranty 3 year meter warranty
Weight (English) 2 lb.
Weight (Metric) 0.9kg

Record accurate and reliable pH, mV, ORP, dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion™ Star A216 pH, DO and RDO Benchtop Meter, ideal for a wide range of applications and advanced pH and dissolved oxygen analysis in the lab. Use the two channels to measure pH and dissolved oxygen simultaneously or view each channel separately. Use an RDO optical or polarographic DO probe for ultimate flexibility in sensors. 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.

Thermo Scientific Orion Star A216 pH/RDO/DO benchtop meters are easy to use, dependable laboratory meters with advanced features and functions. Selectable read modes and stability indicator 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.

  • Combined convenience with the benefits of a pH meter and dissolved oxygen meter in one easy-to-use system
  • Measure pH, mV, relative mV or ORP with temperature on channel one and measure dissolved oxygen in percent saturation or mg/L with temperature using RDO optical DO probes or polarographic DO probes on channel two
  • Easily view individual measurements on a full screen display and quickly toggle to a split screen display to view multiple measurements simultaneously
  • Perform up to a five point pH calibration using automatic buffer recognition of NIST or DIN buffer groups with choice to manually enter custom buffer values and calibration editing option that allows individual points to be fixed without a full recalibration
  • Calibrate dissolved oxygen using water-saturated air, air-saturated water, custom value (Winkler titration) and zero point options
  • Automatically compensate dissolved oxygen readings using ATC temperature, manual salinity input and built-in barometer for barometric pressure readings
  • 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 ten most recent calibrations
  • Non-volatile meter memory ensures your data and settings are protected, even with 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 3-year replacement warranty

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