Wooden measuring stick from distillery industry

hope this is the right forum to ask a question I have a wooden measuring stick that is marked with gallons etc and I understand it is from the distilling industry is there a specific name for such rulers so I can do some research.

Thanks in advance betty

[Jojo]

Hey there Betty! We consulted with a whisky / distillery expert who told us this: "If it has a sliding brass gauge that moves up and down the rod freely then it’s called a “dip stick” and used for measuring the quantity of whisky in a cask. It should be square and each side has markings for the different sizes of casks, i.e. the mark for 26 gallons will be at different levels on each side."

Of course, if you can provide a photo, that would be very helpful.