Rhumbline
Well-Known Member
I've seen this mentioned before and the response is usually "it won't work" but I'm not going to let that stand in my way.
If specific gravity is just a ratio of the weight of one volume of liquid compared to the same volume of water it seems it should be easy to calculate SG by weighing the liquid in question.
If water weighs 8.35 pounds per gallon and I'm calculating for 5.5 gallons, then my reference weight = 45.925 pounds.
I weighed an empty primary and lid, 3.833 pounds so my reference is 49.758 pounds.
An OG of 1.108 at pitching would calculate to 54.717 pounds and an FG of 1.022 would yield 50.768. To put it another way, each 0.001 of specific gravity would equal 3/4 of an ounce.
I would need to have an accurate measure of how many gallons of wort I start with but I don't see why it won't work as long as I can build a circuit to measure weights that accurately.
I could leave the fermenter on the weighing scale and see easily how close I am to target.
It will be early next year before I can focus on this, I've got some other projects in the works.
If specific gravity is just a ratio of the weight of one volume of liquid compared to the same volume of water it seems it should be easy to calculate SG by weighing the liquid in question.
If water weighs 8.35 pounds per gallon and I'm calculating for 5.5 gallons, then my reference weight = 45.925 pounds.
I weighed an empty primary and lid, 3.833 pounds so my reference is 49.758 pounds.
An OG of 1.108 at pitching would calculate to 54.717 pounds and an FG of 1.022 would yield 50.768. To put it another way, each 0.001 of specific gravity would equal 3/4 of an ounce.
I would need to have an accurate measure of how many gallons of wort I start with but I don't see why it won't work as long as I can build a circuit to measure weights that accurately.
I could leave the fermenter on the weighing scale and see easily how close I am to target.
It will be early next year before I can focus on this, I've got some other projects in the works.