From Prototype to Production: Scaling a Custom PI Heater Project

https://industrial-heat-source.greyhavendaily.com/posts/how-to-choose-a-polyimide-heater-for-precision-heating

In sensors, a pi heater must deliver heat in a controlled way. It uses a thin resistive foil circuit laminated in polyimide film. One useful trait is fast response. Still, local hot spots can change the result