Maretron TLM150 Tank Level Monitor [TLM150-01]The TLM150 is used to sense levels of gasoline tanks using ultrasonic technology and transmit the gasoline levels over the NMEA 2000 network. This allows you to observe gasoline tank levels anywhere on the vessel where there is an NMEA 2000 compatible display such as the Maretron DSM250. The TLM150 is capable of sensing gasoline tanks up to 24" in depth. Unlike most tank senders that only work with rectangular tanks, the TLM150 can be calibrated for