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Thermo Scientific™ Orion Star™ A221 pH Portable Meter - PROMO

Reliably measure pH, mV, ORP and temperature with the Thermo Scientific™ Orion™ Star A221 pH Portable Meter for advanced field analysis and printer or computer interfacing

Manufacturer:  Thermo Scientific™ STARA2218PM

Catalog No. 13-303-212PM

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Don't leave your measurements to chance when analyzing samples outside the lab. Orion Star A221 pH portable meters are designed to offer the reliability you need in a user-friendly package for your dedicated pH testing needs. This waterproof portable meter displays critical data with your measurement including temperature, date and time, read type, measurement stability, active calibration info and power source status.
  • 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 choice to manually enter custom buffer values
  • 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 and Continuous shows changing readings with hold option
  • Data log collects and date/time stamps up to 1000 measurement sets
  • 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 AA batteries or optional universal power adapter
  • IP67-rated housing is waterproof for rugged field operation
  • Meter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter stand
  • Meters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty

Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.



Universal 50 to 60 Hz, 100 to 240 VAC power adapter (sold separately)
Calibration due alarm (fixed 12 hour)
800 hr.
pH, relative mV (RmV), ORP and temperature
Transfer single, range or all data points to printer or computer
Orion Star A221 pH portable meter food kit with ROSS Spear-Tip pH electrode and ATC probe
LCD (Graphic with Backlight)
BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe)
7.000 pH
English, Spanish, French, Italian, German and Chinese; Portuguese and Korean Available with Software Update
pH, mV, relative mV (RmV) or ORP with temperature
Orion Star A221 pH/mV/RmV/ORP/Temperature Portable Meter
Universal AC adapter (included) or 4 AA batteries (sold separately)
±2000 mV
-2 to 20
5 to 85%, non-condensing
0.1 mV
Smart Stability and Smart Averaging
5°C to 45°C (ambient)
22.0°F to 221.0°F
Manual or automatic with ATC temperature probe
0.5 kg
±0.2 mV or ±0.05% of reading whichever is greater
Yes, selectable
4 x AA
1 to 5
CE, TUV 3-1, FCC Class A
1000 with Date and Time Stamp
24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
Star A221 pH meter, 8163BNWP ROSS spear-tip pH electrode, 927007MD stainless steel ATC probe, pH 4/7/10 buffer and rinse pouches, ROSS storage solution, protective meter armor, hard-sided carrying case, 4 AA batteries, computer cable
Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Automatic data logging with Auto-Read measure mode; manual data logging with Continuous measure mode
Non-volatile memory preserves data log, calibration log and meter settings
USB, RS-232
pH electrode, ORP electrode, reference half-cell electrode, ATC temperature probe (includes 8163BNWP ROSS spear-tip pH electrode and 927007MD ATC probe)
±2000 mV
±2000 mV
0.1, 0.01, 0.001
0.1°C, 0.1°F
41°F to 113°F (ambient)
1 point temperature offset calibration
-5°C to +105°C
1.2 lb.


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