guessometer 

The range indicator on the instrument cluster of an electric car, particularly Nissan Leaf. It is called a guessometer due to its inability to provide a reliable number for the remaining range of the electric car.

The guessometer dropped to 40 miles just after 10 miles driving.

guessometer by MiKeEchoSierra February 17, 2019

gustometer

A handy tool to precisely measure wind gust.

My gustometer indicates that it may be unsafe to have the rabbits ride in the parade today.

gustometer by Dr Bunnygirl November 29, 2019