home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.electronics
- Path: 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>
- Lines: 10
-
- 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
-