In this instructable I'm going to talk mostly about using the Melexis MLX90614 IR (infrared radiation) sensor. Also, while building a sensor interface board, I'll also take care of driving a Crydom SSR (solid state relay).
There is already a bunch of web info on re-flowing boards using either a skillet or toaster oven. Both of the following links are good:
What I thought was missing was information on instrumenting the skillet. This instructable should take care of that.
Note, Parallax already makes, and sells, a Melexis IR interface board. However, I don't think it has any digital outputs (I could be wrong since I never owned one). There is no way to remotely mount their sensor either - their design has the sensor solder right onto an interface board.