Sensor Placement Strategies for Better Glass Heater Temperature Feedback
https://flexible-thermal-guide.talesignal.com/posts/common-pi-heater-selection-errors-and-how-to-avoid-them
In camera windows, a glass heater must deliver heat in a controlled way. It uses a glass panel combined with a conductive heating layer or heater element. One useful trait is anti-fog capability. Still, thermal stress can change the result