I'm looking for heating wire (to ~200-300 degrees Celsius) that won't disturb a ~weakish applied magnetic field significantly - I would be wrapped it helically around a glass cell which is placed inside magnetic field coils. So if I had two parallel sets of non-magnetic wire attached and coiled together, carrying equal and opposite currents, I believe it would not affect the applied magnetic field. I have seen such a setup in Teachspin's Optical Pumping experiment, where the manual describes the wire as 'non-magnetic bifilar wound heater wire' which I am *guessing* is nichrome/kanthal (could be others though), but I can't find bifilar nichrome/kanthal heating wire for sale anywhere, and I'm not sure if there's a way to safely construct it by myself. Anyone have suggestions for where I could acquire it or something equivalent, or am I using the wrong terminology here? Is it possible to make it by myself out by somehow joining two sets of heating wires together? Any help or ideas at all would be greatly appreciated!