Hanna Portable Dissolved Oxygen Meter

This instrument also allows altitude compensation up to 4000 m and the ppm and % saturation are both compensated for changes in solubility of oxygen in water and for permeability of the membrane as well as the temperature effect.Range O2 0.00 to 45.00 mg/L. Percent Saturation O2 Temperature 0.0 to 50.0°C. Automatic, in air, at 100%. Temperature Compensation automatic, 0 to 50°C (32 to 122°F) Altitude Compensation 0 to 1900 m (100 m 326' resolution) Salinity Compensation 0 to 40 g/L (1g/L resolution) Probe HI 76407/4F with 4 m cable Power Supply 4 x 1.5 AA batteries / approx. 200 hours of continuous use;auto-off after 4 hours of inactivity; or input for 12 Vdc power adapter. Dimensions 196 x 80 x 60 mm (7.7 x 3.1 x 2.4") Weight 500 g (1.1 lb.)