How Cutouts, Edges, and Openings Affect a PI Heater Layout

https://precision-heating-elements.rivetgarden.com/posts/how-temperature-sensors-work-with-a-silicone-heater

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