Get high accuracy and premium performance everywhere you need it with the Thermo Scientific Orion Star A329 pH, ISE, Conductivity, DO and RDO Portable Meter, designed for a wide range of pH, ion concentration, conductivity, dissolved oxygen and temperature testing and field applications. Evaluate samples in the most demanding locations using this waterproof meter with IP67-rated housing. Use the three channels to measure pH, conductivity and DO simultaneously or view each channel separately. Log up to 5000 data point sets with time / date stamp and transfer to a printer or computer. Features: Combined convenience with the benefits of a pH/ISE meter, conductivity meter and dissolved oxygen meter in one easy-to-use systemMeasure pH, ion concentration, mV, relative mV or ORP with temperature on channel one; measure conductivity, TDS, salinity or resistivity with temperature on channel two; and measure dissolved oxygen in percent saturation or mg/L with temperature using RDO optical DO probes or polarographic DO probes on channel threeEasily view individual measurements on a full screen display and quickly toggle to a split screen display to view multiple measurements simultaneouslyPerform up to five point pH and ISE calibrations with calibration editing option that allows individual points to be fixed without a full recalibrationPerform up to a five point conductivity calibrationAuto-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 temperaturesCalibrate dissolved oxygen using water-saturated air, air-saturated water, custom value (Winkler titration) and zero point optionsAutomatically compensate dissolved oxygen readings using ATC temperature, manual salinity input and built-in barometer for barometric pressure readingsInformative, 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 5000 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 operationMeter kits include hard-sided field case and protective meter armor with electrode holders, adjustable wrist/belt strap and built-in meter standMeters offer CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty Includes: Star A329 pH/ISE/conductivity/RDO/DO meterFour AA batteriesPrinted quick start guide and literature CDUSB Computer cable Note: WILL NOT SHIP TO RESIDENTIAL ADDRESSES.