The Milwaukee PH56 is a waterproof pH tester (using the IP67). The PH56 includes a large, dual-level LCD that displays pH and temperature (°C or °F). The large display shows readings in an extended range from -2.00 to 16.00 pH (with a 0.01 pH resolution), and simultaneously shows temperature from -5.0 to 105.0°C or 23.0 to 221.0°F. The PH56 has a stability indicator and hold function that freezes the display for easy and accurate recording. The large display also has graphic symbols to guide you through all operations. The Milwaukee PH56 comes complete with a temperature probe for faster and more precise temperature measurement, which automatically compensates for temperature. Calibration is made automatically in 1 or 2 points with memorized standard and NIST buffer sets. Auto power OFF saves battery power after non-use. The double-junction electrode can be replaced in a very fast and simple way! The modular design allows easy electrode and battery replacement.