H600 Pro Handheld Meter (pH, EC, PPM, TDS, Temp.) The H600 Pro handheld meter is a versatile tool designed for the precise measurement of pH, EC, PPM, TDS, and temperature in liquids. Its user-friendly interface ensures effortless switching between parameters, making it accessible to both experienced professionals and beginners. One of its key features is the built-in calibration indicator, which serves as a proactive reminder for recalibration, ensuring consistent measurement accuracy. This meter is also designed to be compatible with Aqua Master Tools substrate electrodes. For added convenience, the meter comes with a durable carrying case that simplifies transport and protects your investment. In conclusion, the H600 Pro handheld meter combines accuracy, ease of use, and practicality, making it a valuable asset for liquid analysis across various industries. We recommend storing the pH electrode in the protective cap with KCl storage solution.