Record accurate and reliable pH, mV, ORP, dissolved oxygen and temperature measurements with the Thermo Scientific Orion Star A216 pH, DO and RDO Benchtop Meter, ideal for a wide range of applications and advanced pH and dissolved oxygen analysis in the lab. Use the two channels to measure pH and dissolved oxygen simultaneously or view each channel separately. Use an RDO optical or polarographic DO probe for ultimate flexibility in sensors. Log up to 2000 data point sets with time / date stamp and easily transfer calibration and data logs via USB or RS232 to a printer or computer. Features: Combined convenience with the benefits of a pH meter and dissolved oxygen meter in one easy-to-use systemMeasure pH, mV, relative mV or ORP with temperature on channel one and measure dissolved oxygen in percent saturation or mg/L with temperature using RDO optical DO probes or polarographic DO probes 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 values and calibration editing option that allows individual points to be fixed without a full recalibrationCalibrate 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 intervalsEliminate the need for magnetic stir bars using the meter-controlled stirrer probe (catalog number 096019) to uniformly mix solutionsData log collects and date/time stamps up to 2000 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 universal power adapter or optional AA batteriesIP54-rated housing resists dust and splashes and can be wall-mounted if table space is limitedMeters include CE, TUV 3-in-1 and FCC Class A certifications and 3-year replacement warranty Includes: Star A216 pH/RDO/DO meter8157BNUMD Orion ROSS Ultra Triode refillable, epoxy-body pH/ATC electrode083005MD Orion polarographic DO probe with calibration sleeve080513 DO probe maintenance kitBOD adapter, funnel and stirrer810199 ROSS pH buffer & solution kitAttached electrode stand and holderUniversal power adapterPrinted quick start guide and literature CDUSB computer cable Note: WILL NOT SHIP TO RESIDENTIAL ADDRESSES.