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Thermo Scientific - Orion Star A221
Manufactured by Thermo Scientific

Thermo Scientific - Orion Star A221
Orion* Star* A221 pH Portable Meter

The Thermo Scientific* Orion Star A221 pH Portable Meter makes necessary testing easier. Its durability and dependability make it a great choice for samples every day, anywhere. Get the readings that you need where you need them with the Thermo Scientific Orion Star A221 pH Portable Meter. The large, backlit graphic LCD display shows pH/mV/RmV and temperature along with electrode status, time, date and calibration points.


• Anyone can use this meter with its plain language screen prompts, soft keysthat update for easy selection and a multi language interface that supports English, Spanish, French, Italian, German and Chinese • Don’t miss a reading – AUTO-READ* locks in the stable reading on your screen and ready indicator alerts when readings are stable • Up to 5 point pH calibration with automatic recognition for USA/NIST and DIN buffers • Non-volatile memory holds up to 1000 datapoints with time and date stamp • Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software • Four AA batteries (included) provide over 800 hours of operation or purchase the universal power adapter (sold separately) to use AC power • Perfectly portable, waterproof and protected to take anywhere with a IP67-rated housing

mV Accuracy±0.2mV or ±0.05% of reading whichever is greater
mV Resolution0.1 mV
pH Accuracy±0.002
pH Meter Temperature Range-5 to 105 °C
pH Meter TypePortable
pH Range-2 to 20
pH ResolutionSelectable
Temperature Resolution0.1 °C
Power Requirements Four "AA" batteries or optional universal AC line voltage
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Thermo Scientific - Orion Star A221