Worked on the SciML/ModelingToolkitStandardLibrary.jl repository to refactor thermal sensor components, focusing on improving how measured values are represented and tested. The project migrated sensor outputs to use RealOutput, which clarified data handling and enhanced consistency for downstream modeling. To address test fragility, the work decoupled tests from OrdinaryDiffEqDefaults, streamlining configuration and increasing CI reliability. Using Julia and applying skills in modeling, software engineering, and testing, the changes improved both the maintainability and robustness of thermal modeling features. This targeted update addressed a specific issue, delivering more accurate modeling and a simplified, more stable testing process for future development.