Maretron TLM100 Tank Level Monitor - 40" Depth Max - No Gas [TLM100-01]The TLM100 is used to sense levels of liquid tanks using ultrasonic technology and transmit the liquid levels over the NMEA 2000 network. This allows you to observe tank levels anywhere on the vessel where there is an NMEA 2000 compatible display such as the Maretron DSM250. The TLM100 is capable of sensing tanks up to 40" (1. 02m) in depth. It can be used for diesel, fresh water, grey water, black water, and oil tanks. Unlike most tank senders that