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

• Perform up to a five point pH calibration using automatic buffer recognition of NIST or DIN buffer groups
• Informative, easy-to-read backlit graphic display with clear on-screen instructions simplifies operation
• Capture critical readings with measurement stability indicator and selectable read modes
• Auto-Read mode holds a stable reading and Continuous mode shows changing readings with hold option
• Three-year meter warranty

Record accurate and reliable pH, mV, ORP, and temperature measurements with the Orion™ Star™ A221 pH Portable Meter, ideal for a wide range of applications and advanced pH analysis in the field.

These portable meters are designed to provide the reliability needed in a user-friendly package for dedicated pH testing needs. This waterproof portable meter displays critical data with measurements including temperature, date and time, read type, measurement stability, active calibration information, and power source status. Flexible power options with AA batteries or optional universal power adapter. Non-volatile meter memory ensures data and settings are protected, even with loss of power.

Perform up to a five point pH calibration, log up to 1000 data point sets with time or 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.