Ensure optimal nutrients for your plants with this robust and accurate meter. Simply dig the meter into solution and flashing lights provide precise readings adjusted for temperature. Displays conductivity scales of EC, CF, PPM 500 & PPM 700 on a single line. 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. 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. Measure while mixing nutrients in your reservoir.