Re: Humidity Sensor Needed (Cheap!!!)

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#6375

From: G. Stewart Beal
Date: Thu, 27 Aug 1992 01:36

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In article <BtKDF8.4G8@cmptrc.lonestar.org> neal@cmptrc.lonestar.org (Neal Howard) writes:
>Can anyone out there help me with my search for something to use as an
>electronic relative humidity sensor. So far my search has revealed the following
How about opening up a 1.0 MHz crystal and applying a thin film of a hygroscopic
material to it such as a glycerine based highly diluted wash. The calibration
of the frequency of oscillation vs humidity then depends on the added mass.
On second thoughts, maybe a much higher frequency would be better . How about
it? What am I forgetting?
Stu Beal, VE3MWM, U009@cs.cciw.ca
National Water Research Institute

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!torn!maccs!mcshub!csx.cciw.ca!u009
From: u009@csx.cciw.ca (G. Stewart Beal)
Subject: Re: Humidity Sensor Needed (Cheap!!!)
Organization: Canada Centre for Inland Waters
Date: Thu, 27 Aug 1992 01:36:37 GMT
Message-ID: <1992Aug27.013637.13752@csx.cciw.ca>
References: <BtKDF8.4G8@cmptrc.lonestar.org>
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