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thermistors and copper wire

Discussion in 'Home Power and Microgeneration' started by stu, Dec 9, 2004.

  1. stu

    stu Guest

    I have just made up 4 temp gauges with 100k thermistors as per this site
    http://www.benchtest.com/gp_Temp4.html
    I plan to use them to log temps around the house for a bit of fun and to see
    how much difference insulation makes. they seem to be quite good enough for
    what I need, but one thing that I thought of was the wire itself. I have
    used 16*25mm insulated for 240V. What I was wondering is, if I run the leads
    through the roof and then down inside a wall cavity and we say that roof is
    at 50C and the wall cavity at 20C is the wire itself going to conduct enough
    heat to raise the temp of the thermistor in the wall cavity? I think I am
    worrying about nothing but was hopping someone here could give me some ball
    park numbers like degrees C per meter.
    Also any links to site about home insulation would be handy.
    thanks
    stuart
     
  2. You shouldn't have any problems. A temperature differential in the wire
    will cause a negligible change in the thermistor. I routinely run the wires
    through attics, down walls, near hot water and chilled water lines without
    any problems.
     
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