Accurate Brix measurement. Which one is right? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Brewing Software > Accurate Brix measurement. Which one is right?
Sign-up To NEW HBT Article Newsletter - Brewing Articles Direct To You!

Reply
 
Thread Tools
Old 07-14-2013, 11:50 PM   #1
Rugrad02
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Wilmington, NC, North Carolina
Posts: 207
Liked 13 Times on 11 Posts

Default Accurate Brix measurement. Which one is right?

Brewpal tells me 5% ABV
NB tell me 7.8% ABV
Read on:


I use Brewpal as well as Northern Brewer's refractometer calculator http://www.northernbrewer.com/refractometer-calculator/ to measure Brix. You would think the numbers would come out the same but I'm getting two numbers. Unfortunately my refractometer only reads in Brix but I would still like to see where I'm at post fermentation. ABV and Final gravity.

Most recent brew (Saison):

OG 14.80 Brix
FG 6.00 Brix

Data according to Brewpal:

14.80 Brix down to 6 Brix = 5%
Or
1.063 down to 1.025= 5% ABV

Data according to Northern Brewer's During and After Fermentation calc.

14.80 Brix down to 6 Brix = 1.001 FG

Data according to Northern Brewer's ABV calc.

Current Brix 6.00
Current Gravity 1.001
ABV 7.872
OG 1.06

Any ideas why they are different? A fault in an algorithm somewhere?


Rugrad02 is offline
 
Reply With Quote
Old 07-15-2013, 12:33 AM   #2
Yooper
Ale's What Cures You!
HBT_ADMIN.png
Feedback Score: 0 reviews
 
Yooper's Avatar
Recipes 
 
Join Date: Jun 2006
Location: UP of Michigan, Winter Texan
Posts: 68,368
Liked 7297 Times on 5161 Posts
Likes Given: 2070

Default

Remember that alcohol changes light refraction, so the reading of FG is useless. There are some conversion software calculators out there that may be in the ballpark (lots of people like Sean Terrell's), but I've never found one that is accurate.

You can always take an OG reading and convert it to the SG scale, but not a FG reading.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006
Yooper is online now
C-Rider Likes This 
Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Any accurate refractometers for brix and SG? Epimetheus General Beer Discussion 1 12-04-2012 04:33 AM
Brix vs. SG jester5120 General Beer Discussion 12 02-15-2012 07:30 AM
6.2% Brix, is that possible? Sheldon All Grain & Partial Mash Brewing 4 01-30-2011 07:12 PM
What THE BRIX? dgrizzly Fermentation & Yeast 3 08-08-2010 12:03 AM
Brix to OG ? Gabe Equipment/Sanitation 5 07-23-2008 08:26 AM


Forum Jump