Trolmaster Sensor Board (AMP-3) The AMP-3 Sensor Board serves as a link between the pH Sensor and EC/Temp Sensor and Aqua-X Pro/Tent-X Controller, specially designed to fit with these systems. Multiple units may be connected via RJ12 cables into one system for multiple monitoring applications - display of pH level, EC level and water temperature can all be displayed both on its LCD screen as well as a master controller display screen. Features for Multiple Unit Applications. An LCD Display for monitoring is featured for on-site monitoring as well as an RJ12 connection for flexible installation. Lastly, multiple unit applications require an Addressing Key which identifies multiple units to work effectively. Package Contents 1x Sensor Board 1X 16ft RJ12 Cable 1X 4ft RJ12 Cable 16-122degF Humidity90% This Package Dimensions is 160mm(L), 86mm(W), and 86mm(H). Package Contains One T-Shaped Splitter