Level Measurement 30m Water Depth Meter Digital Water Level Meter Submersible Liquid Level Sensor Tank Level Transmitter - Level Measuring Instruments - AliExpress
Technoton products are compatible with Garmin chartplotter
Garmin GFL10 Fluid Level Sensor | Pacific Yacht Systems
GFL™ 10, Fluid Level Adapter | Garmin
Garmin Marine Webinars: How to Calibrate the Garmin GFL Fluid Level Sensor - YouTube