A216 pH/Dissolved Oxygen Benchtop Multiparameter Meter

  • Durable and Dependable Housed in a IP54 rated casing
  • Warranty This product is covered by a three year replacement warranty
  • Large Memory Holds up to 2000 data points
Product Options


If you need to gather information quickly and easily the Thermo Scientific™ Orion Star™ A216 pH/Dissolved Oxygen Benchtop Multiparameter Meter is the perfect choice. Featuring a large backlit LCD display which shows individual pH/mV/RmV results and dissolved oxygen in percent saturation or concentration results with temperature - or all results at once. Stable readings are locked on the screen using Thermo Scientifics™ AUTO-READ™ feature while the 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 and calibration editing enables the user to fix errors without the requirement for a complete calibration. The meter calibrates DO by using water-saturated air, air-saturated water, a winkler titration or zero point calibration. The A216 accepts and automatically recognizes Orion polargraphic and RDO optical/luminescence-based probes for ease of use.

There are many benefits to using the Thermo Scientific™ Orion Star™ A216 pH/Dissolved Oxygen Benchtop Multiparameter Meter and these include:

  • Additional information includes electrode status, time, date, sample ID, user ID and calibration
  • Advanced features such as stability and averaging choices provide additional options
  • Multilanguage interface supporting English, Spanish, French, Italian, German and Chinese
  • Soft keys for easy selection
  • Screen prompts in simple language
  • Automatic temperature, manual salinity and automatic/manual barometric pressure compensation yield accurate DO results
  • Non volatile memory holds up to 2000 data points
  • Data can be easily transferred and kept up to date using the USB and RS232 ports and data analysis software
  • Mix samples without a stir plate or for faster BOD readings, meter can directly control the 096019 Orion Star stirrer or 086030MD Orion AUTO-STIR™ DO probes (each sold separately)
  • Included electrode arm and newly designed probe holder makes it easier to maintain and place probes into samples
  • Meter is powered either by using the included universal power adapter or using four AA batteries
  • IP54 rated housing
  • This product comes with a three year replacement warranty

Manufactured by: Thermo Scientific
Model: A216 pH/Dissolved Oxygen Benchtop Multiparameter Meter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Accuracy (mV) ±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (pH) ±0.002pH
Accuracy (Polarographic DO) ±0.2 mg/L; ±2 % saturation
Accuracy (RDO) ±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, 10% of reading from 20 to 50mg/L; ±2 % saturation
Data Points 2000
Description Orion Star A216 pH/mV/RDO/Dissolved Oxygen/Temperature Benchtop Meter
Display Type Graphic LCD with backlight
Inputs BNC (pH), 8-pin Mini-DIN (temperature), 9-pin Mini-DIN (RDO or polarographic DO with temperature probe), reference pin-tip, stirrer input
Outputs USB, RS232
Range (mV) ±2000.0mV
Range (pH) -2.000 to 20.000pH
Range (Polarographic DO) 0 to 90 mg/L; 0 to 600 % saturation
Range (RDO) 0 to 50 mg/L; 0 to 500 % saturation
Resolution (mV) 0.1mV
Resolution (pH) 0.1, 0.01, 0.001pH
Resolution (Polarographic DO) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Resolution (RDO) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Temperature (Relative Accuracy) ±0.1°C
Temperature Range -5 to +105°C
Resolution (Temperature) 0.1°C
Warranty 3 year meter replacement
Certifications/Compliance IP-54
Calibration Points (pH) 1 to 5
Accuracy (Temperature) ±0.1°C
pH Calibration Points 1 to 5
pH Relative Accuracy ±0.002pH
Range (Temperature) -5 to +105°C