Hey,
I only use my refractometer to check the gravity of runnings during the sparge to get a ball bark number. Once the beer is cooled and in the fermentor I always measure the gravity with my hydrometer.
I use that measurement for all my calculations. It will be more accurate than the refractometer reading.
This is because you use such a small sample volume with the refractometer that any residual water on the lens or cover plate of the refractometer can significantly skew the readings.
I agree they are great for quick readings but you are better off taking final readings with the good ol' trusty hydrometer.
cheers
darren
BTW, I made an APA on the weekend. 1.045 SG. I didn't check the gravity once during the process, only at pitching. (Couldn't find the refractometer)
I only use my refractometer to check the gravity of runnings during the sparge to get a ball bark number. Once the beer is cooled and in the fermentor I always measure the gravity with my hydrometer.
I use that measurement for all my calculations. It will be more accurate than the refractometer reading.
This is because you use such a small sample volume with the refractometer that any residual water on the lens or cover plate of the refractometer can significantly skew the readings.
I agree they are great for quick readings but you are better off taking final readings with the good ol' trusty hydrometer.
cheers
darren
BTW, I made an APA on the weekend. 1.045 SG. I didn't check the gravity once during the process, only at pitching. (Couldn't find the refractometer)
