SSI Technologies, Inc. offers a wide range of level sensors, including: Fluid-Trac fluid, Acu-Trac ultrasonic, and Acu-Trac 485 transducer. These sensors are ideally used for tanks or storage containers that have a height/depth of 32 to 118". These sensors are with engine coolants, urea, sewage water, fresh water, ethanol, diesel fuels, oil, gasoline, etc.