Maretron TLM100-01 Tank Level Monitor 40" Depth Tanks

The Maretron TLM100-01 Tank Level Monitor is purpose-built for anglers, boaters, and marine operators who demand accurate, real-time visibility into fuel, freshwater, and waste tank levels while underway. Whether you're planning an extended offshore run, managing a charter operation, or simply want the peace of mind that comes with knowing your remaining fuel range, this ultrasonic tank monitoring system eliminates guesswork and keeps you focused on the water. Designed for tanks up to 40 inches in depth, this sensor integrates seamlessly into modern marine electrical systems and provides continuous level monitoring without mechanical floats or moving parts that can fail.

The TLM100-01 employs ultrasonic sound wave technology—the same principle used in modern depth finders—to measure tank fluid levels with precision and reliability. The sensor mounts at the top of your tank and transmits sound waves downward, measuring their flight time to the fluid surface and back, similar to how a fishfinder calculates water depth. This approach eliminates the corrosion and fouling issues common to traditional float-style sensors, ensuring accurate readings year after year in saltwater and freshwater environments. With no moving parts in contact with fuel or water, maintenance is minimal and system longevity is maximized, even in harsh marine conditions.

The Maretron TLM100-01 is ideal for powerboats, sailboats, trawlers, and commercial fishing vessels where tank monitoring feeds into integrated marine electronics systems via NMEA connectivity. Boaters who operate multi-tank configurations benefit from the ability to monitor fuel consumption patterns and plan fuel stops with accuracy. Installation requires the sensor to be mounted flush with the tank top—a straightforward task for most marine technicians or experienced DIY boaters with basic electrical knowledge. This monitor pairs exceptionally well with Maretron's ecosystem of marine instrumentation, allowing centralized display and logging on your bridge or helm console for complete vessel awareness.