Dear Stovers, I am going to pilot using a CO sensor made by CITY Technology in the U.K. in my measurements, starting next week. The sensor reads 0-2000 ppm with a resolution of 0.5 ppm. It puts out an analog voltage of 1 mV per ppm. As Tom Reed mentioned a while ago, these electrochemical sensors have cross-sensitivities to other gases. This one appears to have a fairly high sensitivity to ethylene which can be emitted from biofuel combustion. What to do about this? Any cheap sensor seems to be electrochemical, so is there a way to get around the cross-sens problem? I don't have a way to measure ethylene-- obviously, since I'm still working on CO. Tami - Stoves List Archives and Website: http://www.crest.org/discussion/stoves/200202/ http://crest.org/discussiongroups/resources/stoves/ (Under construction) http://www.ikweb.com/enuff/public_html/Stoves.html (Original) Stoves List Moderators: Ron Larson, ronallarson@qwest.net Alex English, english@adan.kingston.net Elsen L. Karstad, elk@wananchi.com www.chardust.com List-Post: <mailto:stoves@crest.org> List-Help: <mailto:stoves-help@crest.org> List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org> List-Subscribe: <mailto:stoves-subscribe@crest.org> Sponsor the Stoves List: http://www.crest.org/discuss3.html - Other Biomass Stoves Events and Information: http://www.bioenergy2002.org http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy http://www.crest.org/articles/static/1/1011975339_7.html Gasification http://www.crest.org/articles/static/1/1011975672_7.html Carbon For information about CHAMBERS STOVES http://www.ikweb.com/enuff/public_html/Chamber.htm