The AMP-3 Sensor Board can be used as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Pro Controller. It is specially designed for the Aqua-X Pro system. It can be connected to the main controller with a standard RJ12 cable. Multiple units can be connected into one system for multiple monitoring applications. The pH level, EC level and water temperature will be displayed on its LCD screen and the Aqua-X Pro master controller screen.