Integrating a PI Heater Into Compact OEM Assemblies

https://advanced-heater-source.focalledger.com/posts/custom-pi-heater-design-for-complex-thermal-requirements

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