Using electronic scales for running gravity reading

[MastersBrewery]

ok simplistically 23L of 1.050 wort weighs 24.15 kg and 23L of 1.010 wort weighs 23.23kg
at the beginning of ferment you add 7-12G of yeast
Now at the end of ferment we have a crap load more yeast/ trub together probably slight lighter in weight by volume than the sugar that's been consumed. I note the total volume with in the fermenter may have reduced by 50-100ml, most of this I'd write off to evaporation

Most of us write 2L off to losses in the fermenter but a lot of this is liquid with solids (yeast and trub) suspended if we were able to separate these solids I'd say you'd maybe be short 300ml all up. so 22.7l of 1.010 is 22.97kg

It would be interesting to check og/fg fermenter weight

 

[ekul]

ok simplistically 23L of 1.050 wort weighs 24.15 kg and 23L of 1.010 wort weighs 23.23kg
at the beginning of ferment you add 7-12G of yeast
Now at the end of ferment we have a crap load more yeast/ trub together probably slight lighter in weight by volume than the sugar that's been consumed. I note the total volume with in the fermenter may have reduced by 50-100ml, most of this I'd write off to evaporation

Most of us write 2L off to losses in the fermenter but a lot of this is liquid with solids (yeast and trub) suspended if we were able to separate these solids I'd say you'd maybe be short 300ml all up. so 22.7l of 1.010 is 22.97kg

It would be interesting to check og/fg fermenter weight

it would be hard to do this calculation purely from og to fg because your volume will change from the co2 loss. The co2 will have a volume in the fermenter but i dont know what this volume would be. Evaporation loss should be fairly low if the fermenter is sealed. If evaporation was a concern airlocks would go dry several time during fermentation.

the trub amount shouldn't make a difference to final weight because it should be there originally. The only thing I'm aware that gets lost from the ferment is the co2.

I'm not 100% sure that 1.7kg of co2 would lost as maybe there are other pathways to alcohol.

I'm going off the formala Sugar --> 1 ethanol + 2 CO2

 

[ArgM]

Where were you all when the naysayers came at the start!
I'm going to be trialing the scales as well as a bubble counter I've knocked up with my next brew which, having been put off for about a month I think I should do this weekend!

 

[ekul]

Where were you all when the naysayers came at the start!
I'm going to be trialing the scales as well as a bubble counter I've knocked up with my next brew which, having been put off for about a month I think I should do this weekend!

i think i replied to this thread but instead of putting the weight i put the volume of gas that would be released. I saw it again and thought maybe the weight difference would be more of use.

Please report your findings, i'm very interested to see what happens.