Using an infrared thermometer and masking tape. I already have both, the thermometer cost $16 on Amazon. But it won't read on shiny metal, so I put a strip of masking tape on the keg. Rub my hand on it to warm it, shoot it with the gun. Where it changes from 60 to 42 is the beer level.
Both of my kegs are getting low, time to brew again. Thankfully I have two other full kegs standing by, but that can go quick.
Both of my kegs are getting low, time to brew again. Thankfully I have two other full kegs standing by, but that can go quick.