Eutech DO 6+ Dissolved Oxygen Meter Product Specifications: Dissolved Oxygen Range 0 to 20.00 mg/l or ppm Resolution amp; Accuracy 0.01 mg/l or 0.01 ppm amp; 1.5% Full Scale % Saturation of Oxygen 0.0 to 200/0 % Resolution amp; Accuracy 0.1% amp; 1.5% Full Scale Temperature Range 0.0 to 50.0 C (32 to 122 F) Resolution amp; Accuracy 0.1 C (0.1 F) amp; 0.3 C (0.5 F) Salinity Correction 0.0 to 50.0 ppt Barometric Pressure Correction 500 to 1499 mmHg or 66.6 to 199.9 kPA Method Automatic correction after manual input No. of Calibration Points Up to 2 points; 100% in air and/or 0% in known solution Special Functions Self-diagnostic; Electrode characteristics; Hold amp; Auto-Power Off after20 minutes Power Requirements 4 x 1.4V batteries; gt; 700 hrs In the Box: Eutech DO 6+ Dissolved Oxygen Meter with 1m Cable Electrode ECDO6HANDY, 2 Assembled Membrane Cap Housing, 1 Refilling Electrolyte (10 ml) amp; Carrying Kit Set. Order number: ECDO601PLUSK or EC-DO601PLUSK