Thermo Orion® Star A121 pH Portable Meters

• Large LCD displays pH or mV readings along with temperature, and shows meter mode, calibration information and battery life.
• Simple button layout and onscreen messages help with calibration and setup menu choices.
• AUTO-READ™ locks in the stable reading and ready indicator alerts when readings are stable.
• Up to 3-point pH calibration.
• Automatic recognition of USA/NIST and DIN buffers.
• Easily recall calibration slope data for procedure checks.
• Non-volatile memory holds up to 50 data points.
• Waterproof. IP67-rated housing.
• Log function: manual or automatic with AUTO-READ™. Log edit: delete last reading or all.
• Inputs: (pH electrode) BNC; (ATC probe) 8-pin mini-DIN.
• Power: 4 x AA batteries (included) or 120V (optional AC adapter). Batteries provide up to 2000 hours of use.
• Warranty: 3 year meter replacement.

Specifications:
• pH range: -2.00 to 16.00 ±0.01.
• mV range: ±1600.0mV ±0.2mV or ±0.05% of reading, whichever is greater.
• RmV range: ±1999.9mV ±0.2mV or ±0.05% of reading, whichever is greater.
• Temperature range: -5.0 to 105.0ºC ±0.1. ATC or manual temperature compensation. Temperature offset calibration.