The Bluelab EC Pen and Bluelab ppm Pen are the latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity. Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control. The Bluelab EC and ppm pens measure how much food the plant has available. You have the option of either the Bluelab EC Pen or the Bluelab ppm Pen. The Bluelab EC and ppm pens provide a compact, quick and handy way to manage the success of your crops to ensure they have the nutrients they need. Teamed with our Bluelab pH Pen, you have a handy, convenient and accurate system for ensuring optimum plant growth and health. The Bluelab pH Pen, Bluelab EC Pen and Bluelab ppm Pen range has been specially developed as an affordable and effective option for hobby or small scale growers.

It is essential when growing with a hydroponic solution to know what the strength of the solution is before feeding your plants and while they are growing. This is easy if you use the Bluelab Truncheon! To take a reading of your solution - simply place the probe head into the solution for 1-2 minutes to reach the same temperature of your nutrient. Remove from the solution and place back in to take the reading as indicated by the flashing lights. Rinse the probe after use in fresh water and clean once a week to ensure the Truncheon Nutrient Meter remains accurate. EC (0.2 - 3.6), CF (2 - 36) and ppm scales (TDS and 700 scale) Fully waterproof No calibration required Auto sense on and off No external switches or adjustable buttons Battery life minimum 1 year (or shelf life of battery