I should heat a gas stream with a non-magnetic heating element to a bit less than 600 Degrees Celsius (1112Fahrenheit) Best would be some resistive foil or wire that can be mounted in a 6mm diameter quarz tube. The power, a few 10 Watts. The wire or foil should not evaporate into the gaz stream, thus the temperature spread should be low over the surface. Actually the surface temperture should be as low as possible. A few 10 degrees more at most.
The application is for one-of.
Rene