• Combine simplicity with accuracy for your portable pH measurements
• Large LCD displays pH or mV along with temperature
• Up to 3 point calibration, with easy recall of slope data
• Auto-Read function locks in stable reading
• Automatic recognition of USA/NIST and DIN buffers
• Nonvolatile memory holds up to 50 data points
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Thermo Scientific Orion Star A121 portable pH meter is ideal for field testing--it features waterproof and durable IP67-rated housing. Large informative display shows pH and mV readings with temperature, battery life, electrode status, meter mode, calibration data, power source, and more. Simple button layout and on-screen messages help with calibration and setup menu choices.

• Waterproof: Yes
• Temperature compensation: Automatic or manual
• Resolution Temperature: 0.1
• Resolution pH: 0.1/0.01
• Resolution mV: 0.1/1
• Range Temperature F: 23 to 221
• Range Temperature C: -5 to 105
• Range pH: -2.00 to 16.00
• Range mV: 1600 mV; 1999 relative mV
• Product Type: pH Meter
• Power: Four AA batteries (included), optional universal AC adapter
• Model: STAR A121
• Meter style: Portable
• Manufacturer number: STARA1215
• Make: ORION
• Interface: USB or RS232
• Display: LCD
• Dimensions " W: 4.25
• Dimensions " H: 9.125
• Dimensions " D: 2.375
• Datalogging points: 50
• CE Compliance: Yes
• Calibration: Up to 3 points
• Buffer recognition: USA, NIST, DIN
• Brand: Thermo Scientific Orion
• Accuracy Temperature: 0.1C
• Accuracy pH: 0.01 pH
• Accuracy mV: 0.2 mV or 0.05%, whichever is greater
• Accuracy Dissolved Oxygen: 2% full scale