Amprobe WT-80 pH/ORP Water Quality Meter Water quality meter measures pH and Oxidation Reduction Potential (ORP) and is used to monitor regulatory compliance and to troubleshoot corrosion in building water and wastewater systems Displays pH from 0.00 to 14.00, with a resolution of 0.01, and accuracy of + or - 0.02 Displays millivolt (mV) readings from -1,999 to +1,999, with a resolution of 0.1mV for readings from -199.9 to 199.9, and 1mV for all other readings, and an accuracy of + or - 0.2mV for readings from -199.9 to 199.9, or 2mV for all other readings Adjustable pH calibration up to 3 points (pH 4.00, 7.00, 10.00) with built-in buffer recognition to help prevent calibration errors, and Manual and Automatic Temperature Compensation (ATC) for measurement accuracy USB port exports data