Waterproof tester for pH and conductivity, temperature display, pH: 0.0 – 14.0, resolution 0.1 pH, auto buffer recognition, up to 5 calibration points; conductivity: 2 ranges 0 – 1990 µS/cm and 2.00 – 20.00 mS/cm, resolution 1 µS/cm and 0.01 mS/cm, 2 calibration points; automatic temperature compensation (ATC), microprocessor controlled, large display