Newsgroups: comp.robotics
Path: brunix!sgiblab!cs.uoregon.edu!reuter.cse.ogi.edu!uwm.edu!spool.mu.edu!howland.reston.ans.net!torn!govonca!knights
From: knights@govonca.gov.on.ca (Shawn Knight)
Subject: Re: Pressure Sensors?!?
Message-ID: <1994Mar16.180537.3025@govonca.gov.on.ca>
Organization: Government of Ontario
References: <2lvirg$6ce@news.bu.edu>
Date: Wed, 16 Mar 1994 18:05:37 GMT
Lines: 17

In <2lvirg$6ce@news.bu.edu> duchad@bu.edu (David Ducharme) writes:

>Hi there,

>come across an article that said the foam used to hold CMOS chips (protective
>foam) is a conductive foam.  If you but an Ohm meter reading across it you
>would get a value.  By compressing the foam, the resistance would go down.

The foam you require is anti-static foam.   I made a few pressure sensors
using this stuff and it works great.   I got the foam when I purchased some
ICs.  They came on it.
 
You may not be getting a value on your ohm meter because the of the amount
of material you are trying to measure.  if the ohm meter probes are any more
than a 3 millimeters apart from each other you will have a resistance value of
more than 3 megaohms...

