Just thought I'd mention something I made today to help me measure water
in my brewpot, which also gets used to heat mash water and hot liquor,
so this helps a lot.
It's a 12" long brass strip (available at most big Ace hardware stores,
in a little display with all sorts of interesting brass and/or stainless
rods, strips, and tubes) inscribed with gallon and half-gallon markings
for my turkey-fryer brewpot.
This will work with any straight-sided pot, using the following formula:
height = 73.53 / radius^2
(that's radius, or half the diameter, squared).
Here's how it works:
My brewpot is 12.5" in diameter. The radius is therefore 6.25".
Plugging it into the formula:
height = 73.53 / (6.25^2)
height = 73.53 / 39.06
height = 1.88
So a depth 1.88" (roughly 1 and 7/8 inches) of water in my pot is one
gallon.
Now that I know the depth for one gallon, I can take my little brass
strip and scratch lines every 1-7/8" along with numbers. I used a
scribing bit on my dremel tool, which made a bit deeper scratches. I
also added half-width lines for half gallon measure.
-Scott
Measuring stick for brewpot
