Hanna pHep 5 is an advanced, ergonomic, waterproof pH and temperature tester, with&nbsp; 0.01 resolution, that measures from -2.0 to 16.0 pH&nbsp; pH and accuracy of &plusmn;0.05 pH. pHep5 features automatic one or two-point calibration to known buffer and automatic temperature compensation.<br /> <br /> Waterproof<br /> Replaceable pH Electrode<br /> Automatic up to Three-Point pH Calibration