Below is an annotated array of parts that I currently have:

One of the main components I need to obtain now includes an amplifier chip.  I already have the ADC, DAC and pH chips.

Next steps:

* Assemble prototype using the above parts!

* Test ultrasound pulses are being correctly generated using oscilloscope

* Program FPGA using VHDL in order to monitor returned pulses

* Build chamber (out of a drainpipe!)

* Complete schematic design

* Get PCB fabricated!

* Assemble PCB