Veeder Root 330160-012 CSLD & PLLD SEM, TLS-350 tank monitor, 6 month warranty
Veeder Root 0330160-012 CSLD & PLLD SEM for the TLS-350. The diagnostic paper included was printed using this SEM proving the SEM was working when tested. A SEM is the black “chip” or “key” that is plugged into the CPU board.