The Maretron TLM150 Tank Level Monitor 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 Maretron TLM150 is capable of sensing gasoline tanks up to 24" in depth. Unlike most tank senders that only work with rectangular tanks, the TLM150 Tank Level Monitor can be calibrated for irregular tank shapes so you can know the true level of your tanks. It is desigend to operate within the harsh demands of the marine environment.