Features automatic calibration & temperature sensor with LCD display.
These waterproof testers are designed for hydroponics & aquaponics growing mediums.Choose the pH tester, the EC/TDS tester, or the pocket pH/EC/TDS tester. Hanna Instruments GroLine Hydroponics Waterproof Tester - Hydroponic Multifunctional Pocket pH/EC/TDS/Temperature Tester.