Thermometer Help Needed!!!

smmcdermott · Dec 13, 2010

I am brewing my first AG batch tonight and the best thermometer I have is my floarting thermometer. In Ice water, it reads 30 F and in boiling water it reads 206 F. Not sure how much to add when figuring my mash temperatures. Please help!! Thanks.

nm999 · Dec 13, 2010

Boiling point will depend on atmospheric pressure so unless you're at sea level your boiling point will be less than 212F. Go with the 2 degree difference you got from the ice water and you'll be good.

Boodlemania · Dec 14, 2010

nm999 is correct. Liquid-in-glass thermometers are essentially linear response devices. For the purposes of brewing, you can factor the 2 degree offset into your calculations and roll on!

BendBrewer · Dec 14, 2010

Throw that glass thermometer away. You will break it in your beer one day.

CanadianNorth · Dec 16, 2010

They are right. As well, you shouuld be using distilled water. Disolved salts, etc, reduce your boiling point.

nm999 · Dec 16, 2010

CanadianNorth said:
They are right. As well, you shouuld be using distilled water. Disolved salts, etc, reduce your boiling point.

Dissolved salts increase the boiling point and reduce the freezing point.

CanadianNorth · Dec 16, 2010

nm999 said:
Dissolved salts increase the boiling point and reduce the freezing point.

Right!! Just wanted to, ah, .... make sure you were paying attention.......

Thermometer Help Needed!!!

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