Bluelab 2.77 EC Calibration Solution (500 ml) is a high-quality conductivity standard designed to keep your EC and TDS meters reading accurately. Use it regularly to calibrate your Bluelab Truncheon, conductivity pens, and other EC meters so you can trust the nutrient strength in every reservoir. The ready-to-use 2.77 mS/cm solution is factory-validated for consistency, making calibration fast and straightforward for busy growers.
