Get high accuracy and premium performance everywhere you need it with the Thermo Scientific Orion Star A325 pH and Conductivity Portable Meter, designed for a wide range of pH, mV, ORP, conductivity, total dissolved solids (TDS), salinity, resistivity and temperature testing and field applications. Evaluate samples in the most demanding locations using this waterproof meter with IP67-rated housing. Use the two channels to measure pH and conductivity simultaneously or view each channel separately. Log up to 5000 data point sets with time / date stamp and transfer logs to a printer or computer. Features: Combined convenience with the benefits of a pH meter and conductivity meter in one easy-to-use systemMeasure pH, mV, relative mV or ORP with temperature on channel one and measure conductivity, TDS, salinity or resistivity with temperature on channel twoEasily view individual measurements on a full screen display and quickly toggle to a split screen display to view multiple measurements simultaneouslyPerform up to a five point pH calibration using automatic buffer recognition of NIST or DIN buffer groups with choice to manually enter custom buffer valuesPerform up to a five point conductivity calibrationCalibration editing option allows individual points to be fixed without a full recalibrationAuto-ranging conductivity values offer consistent readings across entire measurement range without need to recalibrateUse linear, non-linear, EP (USP) or off conductivity temperature compensation with 5, 10, 15, 20 or 25 C reference temperaturesInformative, easy-to-read backlit graphic display with clear onscreen instructions simplifies operationCapture your critical readings with measurement stability indicator and selectable read modesAUTO-READ holds a stable reading, Continuous shows changing readings with hold option and Timed logs data at specific intervalsData log collects and date/time stamps up to 5,000 measurement sets with optional sample ID and user IDCalibration log stores ten most recent calibrationsNon-volatile meter memory ensures your data and settings are protected, even with loss of powerOrion Star Com software facilitates data transfer to a computer via USB or RS232 connectionsFlexible power options with AA batteries or optional universal power adapterIP67-rated housing is waterproof for rugged field operationMeters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty Includes: Star A325 pH/conductivity meterFour AA batteriesPrinted quick start guide and literature CDUSB Computer cable Note: WILL NOT SHIP TO RESIDENTIAL ADDRESSES.