[TheForge] pyrometers

[theforge@mailman.qth.net]

In a message dated 2/19/2004 12:09:43 PM Pacific Standard Time, 
FREEMAB@pt.fdah.com 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
 

 Bruce 
People on Castinghobby and Hobbicasting swear by thermocouple pyrometers. 
Many of them are profesionals or retired foundry experts, so I am looking forward 
to building one. As to optical pyrometers, I had gotten the impression that 
the operator used them to compare and estimate temperatures. If this is the 
case, any reading I took of flame temperature would be open to endless dispute. I 
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 
(apparently they are built for differing temperature ranges--ugh!) Even if 
someone did an accurate temperature reading of these flames, the journey doesn't 
end here. The next two years some of us will be exploring fuel additives with 
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 
going to become increasingly important with time :) Of course, there is always the 
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 


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