[TheForge] pyrometers

Fri Feb 20 08:45:00 2004

There are thermocouples that will handle the temperatures.  They usually
specify to use the larger diameters, and stainless.  Omega or Nantech =
(less
expensive) sell them.

-----Original Message-----
From: [email protected] =
[mailto:[email protected]]
On Behalf Of [email protected]
Sent: Thursday, February 19, 2004 4:05 PM
To: [email protected]
Subject: Re: [TheForge] pyrometers

In a message dated 2/19/2004 12:09:43 PM Pacific Standard Time,=20
[email protected] writes:
Mikey,

You are probably right that a thermocouple pyrometer won't handle the
temperatures you want, but I still consider them useful, as most of our =
work
is done in the range they can handle.

An IR pyrometer can measure temperature of objects that are not visibly
glowing (from heat).  You don't need that sophistication because at the
temperatures (~2500 F) you want to measure, the forge will certainly be
glowing hot.

Here's an alternative: An optical pyrometer.  I have not built one =
myself,
but this is the way I would go if I wanted another pyrometer.

Bruce
NJ
=20

 Bruce=20
People on Castinghobby and Hobbicasting swear by thermocouple =
pyrometers.=20
Many of them are profesionals or retired foundry experts, so I am =
looking
forward=20
to building one. As to optical pyrometers, I had gotten the impression =
that=20
the operator used them to compare and estimate temperatures. If this is =
the=20
case, any reading I took of flame temperature would be open to endless
dispute. I=20
don't want to "have the vapors" twice <G>
Building an optical pyrometer is nevertheless on this year's agenda. =
Both of

these tools are too useful and attainable to ignore. Eventually, I will =
have

to acquire an IR pyrometer too, although they have more problems than
expense=20
(apparently they are built for differing temperature ranges--ugh!) Even =
if=20
someone did an accurate temperature reading of these flames, the journey
doesn't=20
end here. The next two years some of us will be exploring fuel additives
with=20
minor amounts of injected oxygen to burn the extra carbon, MAPP gas in =
these

burners, ceramic nozzles...well, you get the idea. Temperature readings =
are=20
going to become increasingly important with time :) Of course, there is
always the=20
hope of sucking some guy with the facilities to do the testing into =
becoming

a burner builder. Now, that would be convenient. I'm thinking maybe when =
the

book starts being read in the UK.
Mikey=20

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