If we can calculate or measure how hot the smoke resistor gets, it may give us some sort of idea the maximum temperature that could theoretically be reached by the smoke unit as a whole.
Not too long ago, I plugged in a 30 watt soldering iron, waited for it to heat up, and then touched it to a small amount of fiberglass insulation material soaked with some smoke fluid. It smoked profusely. I'm sure the tip of the soldering iron probably tops out at around 750 degrees Fahrenheit or so.
While I kind of doubt that a smoke resistor gets quite that hot, it's good for a starting point anyway??? 
