[kaptain]

I'd guess this probably works great with stationary tanks.
For any tank that moves, unless they have some signal smoothing or stabilization mechanisms built into the unit, the sloshing/stirring of the liquid level in the mobile tank can result in laser detector signal errors, thus, unstable readings.

The desired dampening rate is adjusted with dip switches right on the unit to reduce fuel slosh and gauge bounce by adjusting how fast or slow the gauge reacts to the fuel level change.

Have you tried it yourself on a mobile tank? If so, please share some of your personal experiences.
I am thinking of giving it a try on my 1989 CAT 963 loader, which doesn't have a fuel gauge.  But I am concerned that I have to buy a third party display as it doesn't come one, and after drilling holes then finding out the reading is too jumpy to be readable.