The 19-250 Fuel Level Sender uses LiDAR technology to precisely measure the fuel level in your tank and works with all Classic Instruments' fuel gauges, including short-sweep, full-sweep, and selectable ohm range gauges. It is also compatible with many other gauge brands. This model supports tanks ranging from 4 to 39 inches in depth. Setup is easy with the on-board buttons, allowing you to quickly set the empty and full tank positions, including reserve, on your workbench before installation. After installation, set the empty, half, and full positions on the gauge. The desired damping rate is adjusted using dip switches on the unit to reduce fuel slosh and gauge bounce, controlling how fast or slow the gauge responds to fuel level changes.