For 3-Star portable pH meter Cat. No. 1212002

The Thermo Scientific 3-Star Plus portable pH meter features improved accuracy in calibration and measurement. Waterproof, battery-operated meter stands up to the most demanding field applications. Specifications Model Orion 3-Star Plus pH Portable Meter pH Mode Range -2.000 to + 19.999pH Resolution 0.1/ 0.01/ 0.001pH Relative Accuracy ± 0.002pH Calibration AUTO-CAL* and/ or Manual Calibration; 1 to 5 points; US/ NIST, DIN, and custom buffers recognized mV Mode Range ± 1999.9mV Resolution 0.1mV Relative Accuracy ± 0.2 mV or 0.05% , whichever is greater ORP Calibration EH autocalibration to standard hydrogen electrode Temperature Mode Range -5° to + 105° C Resolution 0.1° C up to 99.9° C, 1.0° C over 99.9° C Relative Accuracy ± 0.1° , ± 1 digit Compensation Automatic or manual, -5° to + 105° C Display Custom backlit LCD; simultaneous display of pH or mV and temperature, pH calibration points, and current electrode condition