FeaturesSimultaneously measures and displays three parameters±1% full scale accuracy at 3-decimal resolution across a wide measurement rangeAccepts two-cell and four-cell conductivity probe to measure up to 500 m/s — meter measures pure water!Selectable multi-point calibration for more accurate conductivity measurements or single-point calibration for quick, convenient calibration with no mistakesMeasures 90.00mg/L in DO concentration and 600% in DO saturation—one of the widest dissolved oxygen measurement ranges offered in the handheld market todayFast and easy DO calibration with 99% calibration option against atmospheric air or 0% calibration against a zero solutionSalinity, Temperature and Pressure Compensation—accurate readings under varying conditionsNo warm up time required with galvanic system of measurementOne-Glance-Tells-All Screen Display with Backlight Electrode status report, calibration data and simultaneous display of up to 4 parametersRecorded readings individually stamped with time and date in GLP compliant formatAuto-logging meter saves readings automatically within seconds to prevent data lossNon-Volatile Memory protects information and meter settings, even when batteries run outFour Levels of Password Protection prevents tampering or accidental data deletion