I've had to take hydrometer readings of my beer quite frequently over the past few weeks. A tip I picked up on one of the forums is to use a sanitised turkey baster to extract the beer from the fermenter and transfer it to the trial jar this saves you from dipping the entire trial jar into the beer and possible infection.
On my first attempt at using this technique I discovered that pressing the bulb whilst the tube is in the beer causes bubbles and the introduction of oxygen into the beer - a definite no no.
the next time I used the Turkey baster I squeezed and held the bulb before it was put into the beer, this resulted in no bubbles.












