See Level SeeLevel II (TM) LED Tank Monitor System for 4 Tanks 709-1003 69-7560

Used to monitor levels for fresh water tank, gray water tank, waste water tank, diesel fuel tank & propane tank. The monitor panel is 7 inch wide x 4 inch height. Includes water pump switch, LCD monitor, 3 tank sensors & connectors. Measures up to 6 water tanks & 2 LP tanks. It is NMMA certified using ABYC(R) standards.