No GPRs please..thanks.
Thanks for the replies.
@dknguyen, by low frequencies i meant something that can be sampled by the ADC taking in to account the 2Fmax Nyquist criteria.
@kchriste, detecting airpockets may result in wrong readings since the airpocket may not be at the bottom of the limestone pile on the point where i try to measure it.I am looking in to it.
@Mike and Burt, i was looking at some ADC's offered by TI and saw that all were available in SMD's( i would prefer otherwise though).I wont be able to process and maintain the maximum sampling rate that i can get so i will store them in a table and then either send it a computer for processsing or use the uc to do it.
If you have anyother info then please share.