Low Pressure Transducers

[KD6JDJ at aol.com]

  Please ignore this post if it is way off base , I just came across it.and
thought that I might suggest the use of a transparent tube with colored water
in it so that you can see how the level of the water varies (monitored by eye
) , as the pressure at one open end varies , with respect the other open end.
  The system works. But it is likely not what you are seeking. It is sure less
$$ than any other system .

     Jerry