Re: humidity sensors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Jim,

What a cool thing!  I have been looking for a way to measure humidity in
the QVAR experiment.  This might be just the ticket.

http://hot-streamer-dot-com/bob/qvar/results/expt6/index.html

You can see the effects of humidity and temperature on my small coil's
secondary with a 4 by 13 inch John Freau top terminal.  I have a nearby
temperature probe but we are using a weather station for humidity.  You can
see how a little rain/snow dropped the Q of the coil about 5PM on May 1st.
It appears operating a coil in a wet environment with a wet roof and damp
surroundings can really drop a coil's Q!  Humidity is a BIG factor!

Cheers,

	Terry



At 09:55 AM 5/2/2002 -0700, you wrote:
>For those wishing to carefully characterize their coil operating 
>environments...
>
>Sensirion is advertising a digital humidity sensor with 2 wire interface, 
>calibrated, etc.  And, a free sample!  
>
>http://www.sensirion-dot-com
>