Specifications: • D.O. Concentration: 0.00 … 20.00 mg/l ± 0.5 % of m. value; 0 … 90 mg/L ± 0.5 % of measured value • Saturation: 0.0 … 200.0 % ± 0.5 % of measured value; 0 … 600 % ± 0.5 of measured value • Part. pressure: 0 … 200.0 hPa; 0 … 1250 hPa ± 0.5 % • Temperature: – 5.0 … 105.0 °C ± 0.1 °C • AutoRead: automatic/manual selectable • Calibration: CellOx/DurOx with OxiCal calibration vessel against external standard • Calibration memory: up to 5 calibrations recallable • Built-in air pressure sensor for compensation: yes • Display: LCD graphic display, backlit • Data memory: manual 200/automatic 5000 • Datalogger: manual/timer driven • Interface: USB slave (PC) • Power supply: 4 x 1.5 V AA or 4 x 1.2 V NiMH rechargeable • Continuous operation: up to 1000 hours (150 with lit display).