The Bluelab Truncheon is the most popular nutrient meter on the market, having proven itself indispensable to hydroponic enthusiasts everywhere. The Bluelab nutrient Truncheon is very easy to use, all you do is place the probe head in the solution and the truncheon lights up to show your nutrient strength in EC or PPM. The Bluelab Nutrient Truncheon may seem a bit expensive but you're paying for the bullet-proof reliability that Bluelabs provide, they have so much confidence in the quality of their product that they offer a 5-year guarantee.
It is very important when growing hydroponically to know exactley what the strength of your nutrient solution is before feeding your plants with potentially toxic or deficient EC levels. This is easy if you use the Bluelab Nutrient Truncheon! to take a reading of your nutrient solution - simply place the probe head into the solution for 30 seconds to allow it to reach the same temperature as your water then remove from the solution and place back in to take the reading as indicated by the flashing lights on the side of the unit.
Clean the Bluelab truncheon in fresh water once a week taking care to thoroughly rinse the probe, this will ensure your nutrient truncheon always takes accurate readings.