Minimum Scale * 0.01% for concentration of 0.0 to 1.00% * 0.1% for concentration of 1.0 to 10.0 % Accuracy * Displayed value +/-0.05% * Relative Precision +/-0.5% Measuring Temperature * 10 to 40° C Extremely Portable: 17 x 9 x 4 cm and weighs less than 1 pound! Automatic Temperature Compensation: No temperature conversion charts! Zero Setting with only AIR: No more standard liquids or span adjustment needed! Digital Display: Easy and accurate readings, without user interpretation! Uses Conductivity: Faster, simpler, and less hazardous than titration! Easy care: Wipe with a moist tissue and that's it! No special storage and handling care, like meters with glass electrodes.