You may want to look into using some car sensors.  GM sells a 3 bar MAP
(pressure) sensor for something like 50$ from any GM dealer.  Takes a 5V
input and will show from 0-5V for full vacuum through 3 bars of
pressure.

-David

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of Charles Linquist
Sent: Saturday, July 30, 2005 6:54 PM
To: Microcontroller discussion list - Public.
Subject: Cheap pressure sensor


I'm looking for a differential air pressure sensor, one that has a
sensitivity of 1" H20 full-scale and is also small.

The only ones I have been able to find are from All Sensors Corporation,

and cost $88 from Digi-Key.

Does anyone know of a cheaper source?


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