Milwaukee’s MW804 MAX is a waterproof multiparameter pH/conductivity/TDS tester in an ergonomic design. This meter has advanced features including automatic calibration and temperature compensation. All pH readings are displayed with a 0.01 pH resolution and accurate to ±0.05 pH. Conductivity is measured up to 19.99 mS/cm and can be converted to a TDS reading using either the default (0.5) or user defined factor. The large multi level LCD displays the battery level at start up and then either pH, EC, or TDS and temperature along with a stability indicator to alert the user when a stable reading is obtained. The pH/EC/TDS probe is replaceable.