In a message dated 98-01-06 21:15:27 EST, you write:

<<
 Do know of any other Gas Sensor Companies?  I'm also looking for
 readily available O2, CO, NO, NO2 Sensors,  4-20 ma or mv output.

 Thanks
 Richard Skinner
 rwskinner@worldnet.att.net >>

Hello Richard,
No I don't have any other sources.  I am currently looking for a Hydrocarbon
detector.  I am trying to build a Pic controlled meter that will warn of an
explosive concentration of solvents in the atmosphere inside our machine.  I
dug one sensor out of a hand held unit I bought.  The sensor is made of a
small heater that warms a conductive polymer.  When the sensor is exposed to
Hydrocarbons, the polymer swells changing its conductivity.

Anyway if anyone else has a URL or two I would be interested.

David Duley
www.dreitek.com