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refractometer flaw?

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ianmowat

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have read that refractometers give false reading in the presence of alcohol !!! have found this to be true...why ????
 

browndog

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Because they measure the sugar content of the sample, not alcohol.
 

bignath

"Grains don't grow up to be chips, son"
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I am not completely sure, but if i had to suppose a guess, id say because the alcohol probably alters how the light is refracted (or bent) in the prism, therefore giving an innacurate reading.

Do a search for refractometer calibration chart or something like that, you'll find several charts that have been drawn up to take into account the presence of alcohol when reading a refractometer.
 

doon

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Just use a program or app to correct it. Simple
 

MaltyHops

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I've charts linked from my sig...
 

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