Features replaceable graphite electrode, adjustable TDS ratio, °C or °F temperature readings, temperature compensation with adjustable ß, battery level indicator, stability indicator, automatic shut-off and automatic calibration all in a floating, waterproof casing. Accuracy ±2% F.S. (EC and TDS). Battery life 100 operational hours. Dimensions: 163 x 40 x 26 mm. Automatic temperature compensation 0 to 60°C. Automatic one point calibration. Supplied complete with protective cap, 4 x 1.5V batteries and electrode removal tool