The Bluelab CF Truncheon is the industry-standard nutrient strength meter trusted by professional growers worldwide. Designed for fast, accurate, and reliable EC/CF/PPM readings, this waterproof, battery-powered tool helps you maintain the ideal nutrient concentration in your hydroponic or soil-based system. No buttons, no fuss – simply dip into your solution and read the flashing LED scale. Whether you're fine-tuning feeding strength or troubleshooting deficiencies, the Truncheon keeps your grow on point. Key Features: Measures EC, CF & PPM instantly Fully waterproof and durable Automatic calibration – no need for recalibration Long battery life (AAA batteries included) Simple dip-and-read operation Trusted by commercial and home growers alike Ideal For: Hydroponic growers, soil growers using liquid nutrients, greenhouse growers, and anyone needing consistent, accurate nutrient strength readings.