The Orion 850Aplus Dissolved Oxygen Meter offers advanced laboratory quality measurement features. Features include automatic temperature compensation, RS232 communication capability, 50 point datalogging, barometric pressure compensation, salinity correction, selectable resolution, two position flip stand, and one or two point calibration. It has a bright LCD display, and simultaneously displays concentration, temperature, mode, and ready. It is supplied with probe, probe service kit, BOD adapter, line adapter, and manual. DO range is 0.0 to 20.0 mg/L (085000)