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From: davidh8@pogo.WV.TEK.COM (David Haight)
Newsgroups: sci.electronics
Subject: Re: How does one make a gas (methane) leak detector?
Message-ID: <8714@pogo.WV.TEK.COM>
Date: 19 Mar 90 21:20:57 GMT
References: <4926@aplcen.apl.jhu.edu> <386@vela.acs.oakland.edu> <3670@kitty.UUCP>
Reply-To: davidh8@pogo.WV.TEK.COM (David Haight)
Distribution: usa
Organization: Tektronix, Inc., Wilsonville,  OR.
Lines: 6


The last issue of MACHINE DESIGN (2/22) Pg.35 "Thin Film Gas Detectors"
reports on work being done at U of MI.  It mentions that a thin film
of tungsten, rhodium, palladium or titanium will change resistance
with exposure to methane.  They have had success in the ppm range and
expect ppb.  These will be cheap - disposable.