I recently purchased a RAPT Pill hydrometer. Having the fermentation revealed in detail to me completely transformed my fermentation experience. It instantly became my favorite brewing tool. I used to poke at my fermenter with anxiety for the first few days to see if anything was happening...
I calibrated my RAPT pill twice with the simple methode and still it's reading 0.007 lower than my hydrometer and my refractometer in wort. My hydrometer is calibrated at 68F and I do compensate for the temperature of the wort. My refractometer gives me a pretty close reading (within 0.002) of...