Apera Instruments SX723 pH/mV/Conductivity/TDS/Salinity/Resistivity/Temp. Portable Handheld Multiparameter Meter Kit

["Designed for lab-grade measurement of up to 5 water quality parameters in the field, including pH, conductivity, TDS, salinity, resistivity, and temperature","Intelligent functions –– auto. calibration, auto. temperature compensation, self-diagnosis, data logging, auto. power off, and more.","3 quality lead-free ATC probes included in the kit (pH and conductivity) for field test at lab-grade accuracy","Automatic electrode recognition –– the meter automatically switches to the right parameter mode according to the connected electrode.","Data logging –– 300 sets of data storage and recalling"]