Hach's sensION+ EC71 Laboratory Conductivity Meter is an all-in-one system with guided menu navigation designed for use in a wide variety of applications, measuring salinity, total dissolved solids, electrical conductivity and resistivity. It arrives equipped with a stirrer, calibraiton flasks, and RS 232 C connectibility. Multiple measuring modes are available, including stability, continuous, or interval. The meter holds up to 400 measurements, calibration data, and cell decords.