Wagner Lipnharski wrote:

> You will be surprised about the "pressure computers", some tinny
> little pressure components, gates, switches, that together can do
> complex calculations and so on.  I don't know if they still in use,
> but I saw some marvelous like that 15 years ago operating in highly
> explosive ambient.

  I believe the original poster stated this application was intended to
*replace* such a device.  Nice as they are, electronics is king!
--
  Cheers,
        Paul B.