Bluelab Commercial Truncheon Nutrient Meter - An EC meter built to last a lifetime – now on a bigger scale Tried and tested by growers worldwide, the Bluelab Commercial Truncheon Nutrient Meter is brilliantly simple, allowing you to measure and adjust nutrient levels for optimal plant performance. What’s more, this meter has been specially designed for hydroponic crops that have higher-than-normal EC during their growing cycle, measuring up to 6.0 EC (60 CF, 3000 PPM 500 and 4200 PPM 700). https://youtu.be/GUTyR8Qv2CI Product Features: Measure up to 3.6 EC, 36 CF, 1800 ppm 500 or 2520 ppm 700 Robust and reliable construction for long-lasting value Fully waterproof; splash, submerge or sink - we've got you covered Automatically detects liquids and bright LEDS indicate measurement for brilliantly simple functionality Long-format design for mixing and measuring nutrient reservoirs simultaneously No calibration required and easy to clean and disinfect All conductivity scales included – EC, CF, PPM 500 (TDS), PPM 700 Industry-leading five-year warranty for peace of mind