[TheForge] Pyrometer (was: Gun Burners)

[robert hensarling]

Bruce, I've had mine in my forge for 2 years now.  I do however have my 
thermocouple in a thermowell, as was mentioned earlier (I think it was this 
forum).
Robert
----- Original Message ----- 
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Monday, April 30, 2007 9:23 AM
Subject: [TheForge] Pyrometer (was: Gun Burners)


The cheapest high-temperature themomoeter (a.k.a., pyrometer) is a 
thermocouple and a millivolt meter.

You'll need a type K or a type R thermocouple.  Connect the leads to a 
millivolt meter.  Convert mV to temperature using a table like this:

http://srdata.nist.gov/its90/type_k/1200to1372.html

Note that deg. F = 9/5 * deg. C + 32.  Or just google up a table in deg. F 
if you prefer.

I recommend you don't mount the thermocouple in the forge, as it will 
eventually burn up.  Just insert it when you want a reading.

You can get thermocouples and tables from 
http://www.omega.com/prodinfo/thermocouples.html

Bruce
NJ



I'd like to find a good high-temp thermometer, but a friend suggested
using some cheap disposable indicators to get started (they melt at
certain temps, I think)... feedback?  Really curious about the correct
amount of air/ventilation.  :)

thanks y'all!

ben


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