Record accurate and reliable dissolved oxygen and temperature measurements with the Thermo Scientific™ Orion Star™ A213 Dissolved Oxygen and RDO Benchtop Meter. This instrument is ideal for a wide range of applications and advanced dissolved oxygen analysis in the lab. Use an RDO optical or polarographic DO probe for ultimate flexibility in sensors. Calibrate using water-saturated air, air-saturated water, custom value using Winkler titration or zero point options. 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.