Bluelab Truncheons have been widely used for years due to the incredible build quality and accurate readings provided. General Information Ensuring your nutrient solution is within the optimal EC range is essential for maximising crop potential and accelerating healthy growth. Benefits 5-year warranty No calibration required Shows EC, CF, PPM 500, PPM700 Automatically detects liquids. Bright LED displays measurement Fully waterproof, can be submerged Constructed to last a long time