The Unsteady State Heat Transfer Apparatus demonstrates transient heat conduction in solids. It includes a heated metal cylinder, thermocouples, and digital indicators to record temperature variations over time. Students can analyze temperature-time relationships and determine thermal diffusivity. Suitable for engineering colleges, polytechnic institutes, and ITIs, this apparatus enhances understanding of non-steady-state heat transfer. The setup is compact, safe, and ideal for repeated academic use.