Accuracy (Temperature) ±0.1°C Accuracy (mV) ±0.2 or ±0.05%, whichever is greater Accuracy (pH) ±0.002 Data Management Details Transfer single, range or all data points to printer or computer Description Orion Star A211 pH benchtop meter with stand Outputs USB, RS-232 Includes Star A211 pH meter, electrode stand, 100-240V universal power adapter, computer cable Measurement Modes pH, mV, Relative mV, ORP with Temperature Calibration pH with calibration editing option, relative mV, ORP and temperature Range (pH) -2 to 20 Resolution (pH) 0.001, 0.01, 0.1 Range (mV) ±2000.0 Range (ORP) ±2000.0mV Resolution (mV) 0.1mV Calibration Points 1 to 5 Temperature Range (Metric) -5°C to +105°C Temperature Range (English) 22.0°F to 221.0°F Resolution (Temperature) 0.1°C, 0.1°F Temperature Selection Manual or automatic with ATC temperature probe Temperature Probe Calibration 1 point temperature offset calibration Display Type LCD, Graphic with Backlight Backlight Option Yes, selectable Memory Non-volatile memory preserves data log, calibration log and meter settings Data Points 2000 with Date and Time Stamp Log Function Type Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode Alarm Output High/low limit alarm, calibration due alarm Inputs BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), stirrer input (stirrer probe) Certifications/Compliance CE, TUV 3-1, FCC Class A IP Rating IP-54 AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003) Dimensions (L x W x H) 24 cm x 18 cm x 11 cm (9.5 in. x 7.1 in. x 4.3 in.) Weight (Metric) 0.9 kg Weight (English) 2 lb. Warranty 3 Year Meter Warranty Keypad Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys Methods 10 per channel with password protection Model Orion Star A211 pH/mV/RmV/ORP/Temperature Benchtop Meter Power Supply Universal AC adapter (included) or 4 AA batteries (sold separately) Probe Type pH electrode, ORP electrode, reference half-cell electrode, ATC temperature probe, stirrer probe (purchase separately) Languages English, Spanish, French, Italian, German and Chinese; Portuguese and Korean Available with Software Update Range (Relative mV) ±2000.0mV Relative Humidity Range 5 to 85%, non-condensing Isopotential Point 7.000pH Stability Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting Temperature (English) Operating 41°F to 113°F (ambient) Temperature (Metric) Operating 5°C to 45°C (ambient) Channels 1 Battery Type 4 x AA (sold separately) Battery Life 800 hr. Unit Size Each