Hans Olsson contributed to the modelica/ModelicaStandardLibrary by addressing a critical issue in sensor temperature output handling. He removed the minimum-positive restriction on relative temperature differences, allowing negative readings and restoring physical realism to the data. This targeted fix, implemented using Modelica and grounded in thermodynamics principles, improved the accuracy and reliability of sensor pipelines and downstream models. The change was carefully scoped to minimize impact on the existing API, ensuring stability while enhancing data interpretation. Hans’s work demonstrated a deep understanding of both the Modelica language and the underlying physical models, resulting in more meaningful and correct simulation outputs.