The Smart 3-in-1 Meter allows your customers the convenience of testing pH, EC and TDS with one easy-to-use meter. This meter comes complete with a replaceable combination electrode, 9V battery, calibration solution, and instructions. The Smart Meter also features automatic temperature compensation, and 1-point manual calibration. This handy combination meter measures pH with a range of 0.00-14.00 and resolution of 0.10 pH, EC with a range of 0.0-6.00 µS/cm and resolution of 0.01 µS/cm and TDS with a range of 0-4000 ppm and resolution of 10 ppm. The pH accuracy is ±0.20 pH and the EC and TDS accuracy is ±2% full scale. The Smart 3-in-1 Meter carries a 2-year warranty and the probe carries a 1-year warranty.