Sensa Tank RV 100 Sensa Tank RV 100 is a 4 sensor system that monitors 3 tanks in 1/4 increments. This top of the line system also allows you to utilize it’s panel for your LPG tank reading. It utilizes the existing sending unit already on your tank (where applicable) and gives you the option of monitoring all your holding tanks and LPG tank all from the same panel. Kit includes 3, 4 sensor 12′ harnesses, interface module, 20′ 8 pin cable and display panel. Display panel is 3-1/2″ H x 5-1/2″ W. *Not for use with metal holding tanks or in fuel/oil applications.