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In article <1790@sputnik.COM> chuckb@tc.fluke.COM (Chuck Bowden) writes:
>
>Can anyone suggest a way to sense barometric pressure electronically? I have
>a 0-5V a/d converter for my computer, and would like to write a barometer
>chart recorder program. The output level of the transducer is unimportant,
>since it can be amplified so that it falls appropriately into the 0-5V range.
>
National Semiconductor makes, or at least used to make, a series of
pressure tranducers which came in gage, differential, and absolute
pressure versions.  The latter should be applicable to a barometric
pressure measurement and, in fact, barometry was mentioned as one of
the applications.

Part numbers were LX05xxA, LX06xxA, LX14xxA, LX16xxA, and LX18xxA for the
absolute pressure versions (where xx corresponds to code numbers for
various pressure ranges).  I have no idea what they cost, but would be
interested in finding out if you look into it.

I found these devices in National's "Data Conversion/Acquisition Handbook".

	pete peterson
	{decvax,linus,wjh12,mit-eddie,masscomp}!genrad!rep