I read about this ISFET-sensor bias in the EDN magazine a few months
back and thought of using it for a similar purpose.  What do you think
of it?  Is it also as delicate?  It doesn't appear to be as
expensive...
http://www.reed-electronics.com/ednmag/article/CA421506?text=isfet


On Thu, 23 Sep 2004 15:10:02 +0200, Morgan Olsson
<dlist@morgansreglerteknik.se> wrote:
> (Resending from correct personality...)
> 
> pH probes are expensive and chemically and mechanically (and electrically) fragile.  I guess the best method is to mix a little distilled water with the soil, then filter out just the water and measure that.
> 
> /Morgan
> --
> Morgan Olsson, Kivik, Sweden
> 
> 
> 
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