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32114Re: [hobbicast] Thermocouples ??s

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  • Leon Risenhoover
    Aug 1, 2004
      "I" tc's are good up to 2400F but at that temp ceramic beads melt. the tc
      should be shielded but at the price you can afford to change them I was told
      by federal corp. here in okc they were $7.50 for just the tc. I got a high
      temp ceramic sheath ( usually used with "B" and "R" tc's)with mine and MY
      cost was 70 bucks have a look at there web site they have a technical
      library that will answer allot of questions
      http://www.federalcorp.com/
      ----- Original Message -----
      From: "coldtoo2000" <coldtoo2000@...>
      To: <hobbicast@yahoogroups.com>
      Sent: Saturday, July 31, 2004 11:18 PM
      Subject: [hobbicast] Thermocouples ??s


      > Hi guys,
      >
      > I built Dan Hartmans improved furnace w/ his dimmer control, but would
      > like to build a temp control or at least a thermometer to moniter it.
      >
      > I've seen several K type thermocouples (mostly probes for digital
      > thermometers), but few seem to go up to 1800*F or so.
      >
      > ??s are:
      >
      > what type have you had luck with (bead, air probe, special)?
      >
      > Will I need to sheild or insulate it (have seen ceramic beads on some)?
      >
      > Where can I buy one, or better scrounge a suitable unit?
      >
      > P.S. The furnace works well, I use 6kw Kenthal type electric (space
      > heating) furnace elements. $8 new.
      >
      >
      >
      >
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