A Practical OEM Checklist for Specifying a PI Heater

https://silicone-heating-insights.oakridgedigest.com/posts/mica-heating-plate-design-factors-that-affect-thermal-performance

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