Oakton Instruments PD360 is a GLP-compliant waterproof portable pH/ORP/Conductivity/TDS/Salinity/Resistivity/DO meter that offers 0.005 pH accuracy, 6-point automatic pH and 2-point DO calibration, 10000 memory, USB output, data-hold, auto power-off and self-diagnosis operation. Kit includes meter, pH electrode, DO probe, sensor caps, wireless SD card, calibration solutioons, batteries and hard case.