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-   -   refractometer (http://www.homebrewtalk.com/f11/refractometer-350099/)

derek224 08-26-2012 05:31 PM

I was looking at getting one of these to use instead of a hydrometer. Are the eBay ones that are 25 bucks shipped any good?

johnp 08-26-2012 07:23 PM

Idk but you'll still need a hydrometer for your final gravity readings.

LoneWolfPR 08-26-2012 07:40 PM

Why do you need a hydrometer for FG?

johnp 08-26-2012 09:57 PM

The presence of alcohol throws off the refractometer reading but apparently there's a conversion somewhere out there so nevermind me.

johnp 08-26-2012 10:01 PM

This is a quote from yooper on another thread:

"It works- sort of.

It will not give you an accurate FG in my experience, even with correction tables and formulas. But it should be within .008 or so. That's a lot, so I don't trust it at all. It won't give you bottle bombs or anything- but the difference between 1.009 and 1.016 is pretty big."

LoneWolfPR 08-26-2012 10:24 PM

I was unaware of that. Good to know.

fpweeks 08-27-2012 11:20 AM

Get the one from brew hardware. It's only a few bucks more than the eBay ones and has S.G.


redketchup 08-27-2012 03:30 PM

I have wrong readings after the boil, when the beer have a lot of hop particules (pellets), so it's only useful for monitoring the mash runoff and measuring the pre-boil gravity. Otherwise, you have to use your old school hydrometer. Any formulas I found to correct the alcohol reading for yhe refractometer were inacurates!

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