Thanks Everyone,

I just checked and the wires coming off the sensor are red and yellow confirming that it is indeed a "K" type sensor. The maximum temperature that we need to check for is approximately 1832 degrees Fahrenheit which is the melting point of Bronze. Thanks for the information and I'll be looking to purchase a MAX675 voltage reference chip as soon as possible. My friend was thinking to have me build the circuit with an LCD in a small box and mount it just ahead of the handle on the sensor and have it operate on batteries which sounds like a good idea to me. I'm assuming that the red and yellow wires coming off the sensor are Cromel/Alumel as Dave said and that it's not a good idea to put any other type of wires in-between the sensor and the micro, I seem to remember someone telling me that years ago. Sounds like an interesting project. So when I get the MAX675 chip I'll read the data sheet and connect it as per instructions to an ADC input and see what numbers I get displaying on my LCD. When using a K type sensor is there a set number of milli amps rise that would equal a one degree rise in temperature for either Celsius or Fahrenheit? I can't wait to fire up the furnace and start melting some aluminum. Is anyone else here into melting metals in a furnace and casting their own parts?

Thanks Again
jessey