Measuring temperature of wire

Oops. If this table is right: Electrical resistivity and conductivity - Wikipedia, the free encyclopedia then both tungsten and copper go up in resistance when temperature increases. Missed that. Thanks.

My tinnitus is at last drowned out by the work of Georg Friedrich Händel:

YouTube - ‪Hallelujah - G.F. Handel "Messiah" - Bethany College Choir‬‏

JimB

For closure, my solution to this was to use a very long wire and make my voltage measurement connection as tight as possible in the highest current carrying area (the underside of a wire twist). I also used a nice fluke multimeter to measure the current but it didnt seem to be varying much (with my long wire the voltage drop was much higher so maybe having a larger load helped the PSU).

The calculated resistance seemed quite reliable to determine temperature rise.

The biggest issue I had though was that the temperature coefficient of resistance in copper its fairly different from different sources, ranging from 0.38% to 0.42%