I'm currently in the process of acquiring the components I need for the project.  I've added them to the list of components that I'll be using.

I'm planning on using an FPGA to process the signal from an ADC.  The ADC will recieve the pulses from the ultrasound transducer.  From the pulses I aim to measure both the speed of sound in the beer along with the amplitude of the pulses.  By combining these two variables it should be possible to measure the specific gravity according to scientific literature.