With the Bluelab Guardian Monitor, you will be able to continuously monitor the key parameters of pH, EC and Temperature. There’s no need for manual measurements and spot checks; instead, you will only need to adjust for pH and nutrients. The Bluelab Guardian Monitor has a striking backlit LED display to view pH, EC, and temperature readings with ease. Enjoy 24/7 monitoring of all three parameters with easy pH calibration, plant-safe green LEDs, and a non-volatile memory that keeps settings even if power is lost. A generous 2-meter cable provides flexibility in positioning and viewing, and its easy-to-clean design is built for all clean environments.