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41605Re: [hobbicast] Furnace temperature

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  • Dan Brewer
    Jan 4, 2012
      Just a little on how a thermocouple works. When two dissimilar metals are
      joined the, junction makes a small voltage. In looking at wicopedia the
      type of thermocouple you want is type C if you can do the heat in a
      vacuum. Other thermocouples that will measure in the temp range are B R S
      T. Type K and J are4 the most popular because they are inexpensive and put
      out the most voltage or degree of temp rise. There are many other ways to
      measure temp but most are on reliable below 200 deg C.

      Remember that your hookup wire needs to be the same type of wire as the
      Omega has a reaqlly good site to find out what you need to measure temp.

      Dan in Auburn

      On Tue, Jan 3, 2012 at 9:01 PM, Jim Rogers <jr@...> wrote:

      > **
      > Glad to know that there is someone else in the neighborhood casting in
      > the back yard, and like the boys in Washington are conspiring to do, it
      > would be good to have a foundry day at someone's place. I heard on one
      > of the groups that there is someone else in the Fontana area, too, but
      > haven't talked with him yet... Anybody else in the area?
      > Jim
      > On 1/3/2012 5:48 PM, Carl wrote:
      > > Jim:They do have a controller that reads to 1600 degrees C for a good
      > price. The thermocouples only go to 1250 degrees C. I'm about 20 miles east
      > of you. A while back I think you said you needed some better quality scrap
      > for casting. I have a lot of cast aluminum. I also have a 5 gallon bucket
      > of VW valve guides. I believe the OEM ones are a brass alloy and the
      > aftermarket ones are a silicone bronze alloy. I'll sell it for the same
      > price the recyclers are paying me if you need anything. There is also some
      > copper but I have been holding that hoping the price will go back up.
      > Thanks Carl
      > >
      > >
      > --
      > [Non-text portions of this message have been removed]

      [Non-text portions of this message have been removed]
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