[aprssig] Chemical sensors

Russ Chadwick russ at wxqa.com
Thu Oct 7 21:43:05 CDT 2004

Does anyone know of an inexpensive sensor that can measure the concentration
of a given gas in the atmosphere?  For example, something that could give
the concentration of poison gas as might be used in a terrorist chemical
attack.  A device that could monitor the concentration of this gas might be
a good addition to APRS weather stations situated in large cities.  I'd
appreciate it if you could send me any URLs off line.


Russ Chadwick    KB0TVJ
Boulder, Colorado, USA

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