Subject: Re: Source for thermocouples

From: [email-masked] (Phil Langefeld)
Date: 2 Dec 1996 20:08:30 GMT

In article <[email-masked]>, [email-masked] says...
>
>[email-masked] (Alan Shinn) wrote:
>
>> If you use a digital voltmter (or any other high impedence meter, you
>> don't need to calibrate, you can get charts of millivolts vs temperature
>> difference between the hot and cold juction.
>

I don't know if the tables are on the net, but several are published in the 
Handbook of Chemistry & Physics by CRC.

Type K thermocouples won't go anywhere near the 3100 degree limit desired, but 
*two* could be embedded in the refractory wall different distances from the 
furnace core.  The reading of one and the difference between the two could be 
used to infer the temperature of the core.

Type K units can be had for ceramic kilns for about $30.  Armadillo Clay in 
Austin, Tx has them for that.  Also W.W. Grainger has some that might suffice 
for about $50-60.

Ceramic cones might work, but they only read from about 1000 degrees to 
slightly over 2000.

Phil Langefeld