* The Hanna Multipurpose Combo Waterproof Tester offers accurate pH, EC/TDS and temperature readings in one tester * The waterproof Combo meter has a large simple to read, two level Liquid Crystal Display and automatic shut-off function * The pH and EC/TDS readings are automatically adjusted for the effects of temperature (ATC) * This advanced technology tester has a replaceable pH electrode unit with an extendable cloth connection and a EC/TDS graphite electrode that prevents contamination by salts and other substances * These features extend the life of the meter * Range pH 0.00 to 14.00 pH * Range EC 0 to 3999 µS/cm * Range TDS 0 to 2000 ppm * Range Temperature 0.0 to 60.0°C / 32°F to 140.0°F