Originally Posted by UNCTUOUS
From linked comments, regarding control of pitot heat:
This could be done via an altitude switch or via an outside air temperature (OAT) threshold. This recourse assumes that the OAT
If the underlying problem is that there can be both too little and too much pitot heat, then it seems that the logical approach is the direct one: to embed a thermistor in the pitot head and regulate the heat (for example, by duty cycle) to maintain a safe temperature at any speed/altitude. Someone likely knows a good temperature to use for the core of the probe that would keep the whole probe ice-free, possibly 40-60C?