Simultaneous Thermal Analysis (STA) is a technique that combines Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) in a single instrument to measure both heat flow and weight change of a sample at the same time. This dual measurement allows researchers to directly correlate thermal events such as melting, crystallization, or decomposition (from DSC) with mass loss processes like evaporation, oxidation, or thermal degradation (from TGA). STA provides deeper insights into material behavior by eliminating the need for separate experiments and ensuring perfect synchronization of data. It is widely used in polymers, pharmaceuticals, ceramics, metals, and composites to study thermal stability, composition, purity, and reaction mechanisms. Because it delivers comprehensive information in one analysis, STA is a powerful tool for both research and quality control in materials science and industry.