I have a small 6"x6"x4" oven and need temperature control.

I am considering a Fuji PXR3 temperature/process controller and will need a
thermocouple and a power switching device.

My electronic skills are pretty basic. I would welcome advice on what
thermocouple, insulation and housing is best suited.

Should I choose a relay or a sold state relay?

Is there a better way to heat treat and case harden?

TIA, John.