My factory sender was a float on a lever arm. Never worked because the arm hit a baffle in the fuel tank. Even if it had worked, it would not be remotely accurate given the shape of the tank. Vertical float designs have the same problem.
As I recall from other threads, there is a fuel gauge unit that meters flow, rather than measuring fuel level. I imagine that solves the problem.
I personally don't have a problem. No fuel gauge. An hour meter and a log book give all the information I need.
I usually start with Defender.
https://www.defender.com/product.js...g-unit&path=-1|311|2349059|2349071&id=4520214
Steve is pointing out that you have to calibrate these float devices for our custom tank shapes. Start with empty tank, note how many gallons go in per unit of gauge measure.