Thermo Scientific Eutech DO450 is an advanced GLP-compliant waterproof portable optical Dissolved Oxygen meter that offers backlit LCD display, auto-calibration, auto correction salinity and barometric pressure measurements, 500 memory, datalogging options, data-hold, stability indicator, auto power-off, electrode diagnosis and USB data output. Unit comes with foldable hinge and mains-powered option for benchtop use. Set includes meter and submersible rugged optical DO probe/sensor (3m cable).