Thermo Scientific Orion Star A221 Portable pH Meters

Record accurate and reliable pH, mV, ORP and temperature measurements with the Thermo Scientific™ Orion Star™ A221 Portable pH Meter. This meter is ideal for a wide range of applications and advanced pH analysis in the field. Perform up to a 5 point pH calibration, log up to 1000 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. Waterproof meter ensures durable, rugged performance in outdoor environments with an IP67-rated housing.

Specifications for Thermo Scientific Orion Star A221 Portable pH Meters
pH mV Temperature
Range -2.000 to 20.000 ±2000.0 mV -5 to 105
Resolution 0.1, 0.01, 0.001 0.1 0.1
Relative Accuracy ±0.002 ±0.2 mV or ±0.05% of reading,
whichever is greater
Calibration Points Up to 5 - -

Don’t leave your measurements to chance when analyzing samples outside the lab. Orion Star A221 Portable pH 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 5 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
  • 3-year replacement warranty
Item Meter Model Unit of Measure Price Purchase
A221 kit with ROSS Ultra Triode low maintenance gel pH/ATC electrode Each
Buy 1 $1,305.57
Buy 2 $1,149.88
Contact customer service for ETA In Stock
A221 pH Portable Meter Only Each
Buy 1 $665.79
Buy 2 $578.07
Contact customer service for ETA In Stock

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