The problem here is "repeatability" and "correlation" of your
measurement to the wood industry wood moisture content standard. Using
anything less than a wood moisture measurement device would result is
poor results. That is, the contact surface area of the probes, the
distance between the probes will cause your results to have a high
error factor between measurements. There are other variables to
consider also but I don't want to get to technical. In addition, using
conversion tables to convert OHM's or MHO's to wood moisture content
will further erode your results. Most Resistance (OHM) or (MHO)
Conductance meters today are digital.
A VTVM (Vacuum Tube Volt Meter) I don't think they are that readily
available unless you are an old timer like me who began training in
electronics technology in 1968 and worked in that field since I
retired last year.
Anyway, I am curious of your application of the data of this
measurement.
I am a retired electronics technician, learning woodworking technology
now.
Take care all.
Francis




On Fri, 17 Aug 2007 22:52:15 -0700, "SonomaProducts.com"
wrote:

You may not be an "ingineer" but you play one hell of a round of golf.
I suppose you like the woods the best.


On Aug 17, 6:09 pm, Tom Watson wrote:
Now John:

You know damned well that I ain't no ingineer - however, there are
available articles on transferring the results of probes attached to a
VTVM to understandable resistance readings that, when applied to
tables indicating species resistance at a certain EMC will give an
approximation of what a ninety dollar moisture meter will do.

This is why accountants and project managers sit over ingineers.

On Fri, 17 Aug 2007 20:59:23 -0400, "John Grossbohlin"

wrote:
For the electrical engineer types amongst us:

Figuring that moisture meters are measuring some dimension of electricity is
there some way a multimeter could be used for measuring the moisture ratio
in wood? ...maybe with the application of math after taking a reading of
some property of the electrical current passing through the wood?

Curious...

John

Regards,

Tom Watson

tjwatson1ATcomcastDOTnet (real email)

http://home.comcast.net/~tjwatson1/