Maretron Tank Level Monitor TLM150. 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 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. Specifications for Maretron TLM150 Tank Level Monitor: Manufacturer: Maretron Color: Black Features of Maretron TLM150 Tank Level Monitor Load Equivalence # (LEN): 2 Package Contents: Maretron TLM150 Tank Level Monitor Maretron TLM150-01: Tank Level Monitor TLM150