Displaying all the conductivity scales EC, CF, PPM 500 & PPM 700 on a single line. Each time you feed your plants it’s essential to know the nutrient levels of your solution. Simply done with the Bluelab Truncheon Nutrient Meter. Flashing lights indicate your conductivity reading, which is automatically compensated with the integrated temperature sensor. Removable shroud for easy cleaning. It features a conductivity range up to 3.6 EC, 36 CF, 1800 ppm 500 and 2520 ppm 700 and is fully waterproof. Provided with EC, CF, ppm 700 and ppm 500 scales. Includes an auto on/off function with no calibration required (factory calibrated). Daylight readable blue LEDs, visible in bright or dark environments with no buttons or switches. Battery operated (3x AA batteries included). Measure while mixing nutrients in your reservoir.