I have one I use for other things. If you are going to point it at stainless, you need a dull spot or it will reflect the laser back and not give a proper reading.
Otherwise its a nice tool.
Yellow beer (pale ale) in keg
Chocolate stout In keg
Front Porch Porter in keg
weat beer and fruit in the conical
IPA of some kind on Deck!
I get more out of it when I put more into it. :)