This is the blog of Ronald Bartels that wanders on and off the subject of problem management (that is how it started), but it is best described by Ray who says this is Daddy's thoughts! Like the best music is from the Eighties and a wee dram helps in solving most inconveniences.
Powalevel - measuring liquids in tanks
One of the use cases for liquids to be measured in a tank. The purpose
is not to provide an accurate billing system that can typically only be
achieved using ether a flow meter or pressure sensor, but to determine
pilfering or leakage. Additionally, in the case of a standby generator
with a fuel tank attached, it can be used to determine when to refuel.