Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Refractometer question
Reply
 
Thread Tools
Old 05-06-2012, 05:19 PM   #1
jldc
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
jldc's Avatar
Recipes 
 
Join Date: Nov 2008
Posts: 662
Liked 6 Times on 6 Posts

Default Refractometer question

I've noticed that when I use my refractometer to check my pre-boil and post-boil gravity that if I put a sample of hot wort on the refractometer the reading will be lower at that moment than it will be 5-10 min later. I had assumed this was due to the wrote cooling to room temperature, but I started wondering if it was from the sample evaporating and concentrating on the device. Any experts out there who can clue me in?

L


jldc is offline
 
Reply With Quote
Old 05-06-2012, 05:26 PM   #2
Dan
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Dan's Avatar
Recipes 
 
Join Date: Oct 2010
Location: Makakilo, Hawaii
Posts: 6,590
Liked 2049 Times on 1272 Posts
Likes Given: 2921

Default

Not an expert. More than likely your refractometer, unless it is very old is ATC, automatic temperature corrected. Which is a little misleading because it doesn't work at 212 however the small sample taken will cool down very quickly to the refractometer's calibrated range which is somewhere around 60-80 degrees.

I usually check the reading after about 30-40 seconds, sometimes a bit longer. Shouldn't take 5-10 minutes. You could try testing it with boiling tap water and see how long it takes to read 1.000, or whatever your tap water reads at ground water temps.
Dan is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Used the refractometer- now a question BmillaTheBrewzilla Equipment/Sanitation 14 09-08-2011 08:20 PM
refractometer question? goose1873 Equipment/Sanitation 10 06-17-2010 07:41 PM
Refractometer Question luthierzan Equipment/Sanitation 1 06-03-2010 02:27 PM
Refractometer question: 32% vs. 40% camiller Equipment/Sanitation 9 07-29-2009 01:16 PM
Refractometer question? Slappy White Equipment/Sanitation 7 12-04-2008 05:55 AM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS