[Rockhounds] Hi Temp Moisture Sensor

[J Bryan Kramer]

There are lab instruments that do just what you suggest, they have a built
in scale, they are computerized and generate all sorts of data. But first
they work on small samples, a couple of grams, and second think $20000 and
up for one. LECO is a big manufacturer of that sort of thing, you can google
them. A normal scale would not survive those sort of temps.

BK

On Thu, Jul 10, 2008 at 10:19 AM, Gary Brown <gbrown at catspaw-minerals.com >
wrote:

> Yeh... Any sensor that would do what she wants would be REALLY expensive.
> The cool 'n check wouldn't work... It's a continuous process and once you
> start, you can't stop.
>
> ~~ however ~~
>
> Your weighing idea gives me an idea.  When the mold is made a "standard"
> block of mold gunk would sit on some sort of weighing sensor.  When ALL the
> water was driven out that block would weigh less and it could trip the
> sensor.  Of course I'm waving my arms here...but it's an idea.
>
> I've BCC'd my friend on this...
>
> GcB
>
> > -----Original Message-----
> > From: rockhounds-bounces at lists.drizzle.com
> > [mailto:rockhounds-bounces at lists.drizzle.com] On Behalf Of J
> > Bryan Kramer
> > Sent: Wednesday, July 09, 2008 7:44 PM
> > To: gbrown at catspaw-minerals.com; Rockhounds at drizzle.com: A
> > mailing list for rock and gem collectors
> > Subject: Re: [Rockhounds] Hi Temp Moisture Sensor
> >
> > OK I have been without WIFI for a couple of days. But at 1000
> > or 2000 degrees you are no longer looking for water you are
> > looking for steam, you might even start getting some
> > disassociation at the higher temp. That would probably need a
> > ir spectrometer type detector which would cost a LOT more
> > than she is interested in paying. The only other approach I
> > can see is to pump some air out, cool it to room temp and run
> > more normal tests on the room temp condensate.
> >
> > More practically is to use weights, weigh the mold cold. Heat
> > it for say 15, 30, 45, 60, 75 minutes. Cool it down and
> > reweigh, when you get a constant weight the water is gone.
> > You'd have to use a fresh mold for each test. Then just heat
> > the molds for that time you determined ever after. There is
> > no cheap instrumental method that I know of.
> >
> > BK
> >
>
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-- 
"Stand therefore, and fasten the belt of truth around your waist, and put on
the breastplate of righteousness."


J Bryan Kramer
North Florida, USA
photos at:
http://pbase.com/photoburner


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