Do hop particles and other solids floating around in your hydrometer tube after the boil effect the OG reading? It seems that they could contribute to displacement of the hydrometer and offset the reading or is this not an issue in any way?
orfy said:You are not weighing the liquid or measuring the volume.
So if the particles are not impeding the free floating of the hydrometer, it will NOT change the density.
Only the type of liquid or dissolved additives will change the density.
# 3 make sense to save any errors.
iamjonsharp said:I'm not 100% sure about this. I remember using hydrometers in the soils lab to measure soil grain size. Fine soil was mixed in water (or some other solution) and we would measure the change in hydrometer readings over time as the soil particles settled out.