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From: Terry King
Subject: Re: Water sensor
Date: Fri, 17 Jan 2003 10:58:41 -0500
Organization: Mountain ClockWorks
References: <email@example.com> <firstname.lastname@example.org>
X-Newsreader: MicroPlanet Gravity v2.30.1784
> *That* is a neat solution/approach to inexpensive probe construction. I wonder
> how a silver-mica cap would work vis-a-vis long-term stability.
Hmm.. Silver-mica's have pretty thin mica, up to 400V or so. The
challenge would be in cutting the capacitor to expose a side where the
stacked silver/mica layers are. Difficult to get a clean cut without
'smearing' the metal and shorting it out. Maybe the edge could be
cleaned up with fine sandpaper?
I wonder if this would detect 'mist' landing on the 'sensor'?
There are multi-layer ceramic capacitors for larger values. Maybe
'fracuring' one of those would create a more-sensitive 'sensor'.
In any case, the sensor is well bypassed!
Regards, Terry King ...In The Woods In Vermont
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